Final answer:
The Log a Call function can be used on the Contact, Lead, Loan, and Relationship pages.
Step-by-step explanation:
The Log a Call function can be used on all of the following pages: Contact, Lead, Loan, and Relationship. This function allows you to record and track communication with a specific individual or organization. For example, you can log a call when you have a conversation with a potential customer or when you follow up with a lead.