D. Amazon CloudWatch
Amazon CloudWatch is a monitoring service for AWS resources and the applications you run on AWS. It provides data and operational intelligence for various AWS resources, enabling you to gain system-wide visibility into resource utilization, application performance, and operational health. CloudWatch has a free tier that offers basic monitoring for many AWS resources at no cost, with no usage limits. This free tier includes data ingestion, data storage, and data access for some metrics and alarms, and certain number of Alarms and Dashboards.
AWS Organizations is a service that allows you to centrally manage multiple AWS accounts as a single entity, known as an organization. Organizations enables you to create and manage AWS accounts in a hierarchical structure, set up policies to apply to all accounts, and enable consolidated billing across all accounts in the organization. AWS Organizations has a free tier, but it is limited to management of up to five accounts. Additional accounts will be charged at the standard rate.
Amazon CloudWatch provides a free tier that includes basic monitoring and logging services with some usage limits. This free tier includes the ability to monitor up to 10 metrics, store up to 5 GB of logs, and retrieve logs up to 5 GB per month. Beyond these usage limits, additional charges apply.
So the answer is B, AWS Config.
Correct Answer is Oprion C - AWS Organisations.
AWS Organizations is offered at no additional charge. You are charged only for AWS resources that users and roles in your member accounts use. For example, you are charged the standard fees for Amazon EC2 instances that are used by users or roles in your member accounts.
https://docs.aws.amazon.com/organizations/latest/userguide/orgs_introduction.html
Other options are not free always. They have a free trier with limited usage but will have to pay when you cross usage limits.
There's an easier more logical way to answer this question without an explanation or reason--just look up the pricing pages for each service. These services all have a Pricing page: AWS Config Pricing, Amazon SageMaker Pricing, and Amazon CloudWatch Pricing. AWS Organizations does not have a Pricing page so the answer is C.
C. AWS Organizations
"AWS Organizations pricing
AWS Organizations is offered at no additional charge. You are charged only for AWS resources that users and roles in your member accounts use. For example, you are charged the standard fees for Amazon EC2 instances that are used by users or roles in your member accounts. "
https://docs.aws.amazon.com/organizations/latest/userguide/orgs_introduction.html#:~:text=.-,AWS%20Organizations%20pricing,-AWS%20Organizations%20is
Free to use
AWS Organizations is a feature of your AWS account offered at no additional charge. You are charged only when you access other AWS services from the accounts in your organization.
https://docs.aws.amazon.com/organizations/latest/userguide/orgs_introduction.html
C. AWS Organizations is the AWS service that has unlimited free use.
AWS Organizations is a service that enables you to centrally manage multiple AWS accounts within your organization. It provides features such as consolidated billing, policy-based management of accounts, and service control policies. AWS Organizations is available at no additional cost, and there is no limit to the number of accounts you can manage with it.
Amazon CloudWatch is a monitoring service for AWS resources and applications. It provides metrics and logs, which can be used to monitor the performance and health of applications, as well as to trigger alarms and automated actions based on predefined thresholds. Amazon CloudWatch offers a free tier of usage, which includes limited amounts of metrics, alarms, and logs.
B. AWS Config
AWS Config is a fully managed service that provides an AWS resource inventory, configuration history, and configuration change notifications to enable security and governance. It helps you assess, track, and manage the configurations of your AWS resources.
AWS Config has a free tier that includes a limited number of resource types and configuration items, as well as a limited number of configuration changes and evaluations per month. However, AWS Config also offers unlimited free use for a specific set of use cases, including security and compliance auditing and change management, as well as resource inventory reporting and optimization.
Other AWS services, such as Amazon SageMaker and Amazon CloudWatch, do not have unlimited free use, and are subject to normal AWS usage charges. Additionally, AWS Organizations is a service that helps you consolidate multiple AWS accounts into an organization, and does not have a free tier for usage.
Is AWS organizations free?
Free to use
AWS Organizations is a feature of your AWS account offered at no additional charge. You are charged only when you access other AWS services from the accounts in your organization.
https://docs.aws.amazon.com/organizations/latest/userguide/orgs_introduction.html?nc2=type_a
AWS Organizations features :
Free to use
AWS Organizations is a feature of your AWS account offered at no additional charge. You are charged only when you access other AWS services from the accounts in your organization. For information about the pricing of other AWS products, see the Amazon Web Services pricing page.
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