Exam Certified OmniStudio Consultant topic 1 question 43 discussion

Agents for an insurance company need to know the current and past weather conditions when creating claims for customers. The consultant implements a FlexCard for weather conditions in the console to ensure the agents have access to the information. The FlexCard needs to provide fields extracted from a weather API and account fields from Salesforce.
According to best practice, what data source should be used?