The Integration Procedure needs three separate responsibilities: retrieve Salesforce data, process it with Apex, and return the final response. A Data Mapper Extract Action reads Salesforce data and returns selected records and fields to the Integration Procedure data JSON. A Remote Action calls an Apex class method or invocable action, which satisfies the requirement to process data through Apex. A Response Action then returns the final data to the caller. Data Mapper Post Action is wrong because it writes data to Salesforce rather than retrieving it. HTTP Action is wrong because it calls an external REST endpoint, not an Apex class. The correct Integration Procedure design is therefore Data Mapper Extract Action, Remote Action, and Response Action.

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