All of them are quite large structures on their own, instead of explaining them one by one, let me explain them through "case".
"You can use case management in Microsoft Dynamics AX and in Enterprise Portal for Microsoft Dynamics AX to record, update, track, follow up on, and close issues that are raised by your customers, vendors, or workers, or that are created through your audit processes."
"Because you can use case management for customer, vendor, or worker issues, the Cases form is located in Home in Microsoft Dynamics AX. Audit cases are always managed in Compliance and internal controls, even when they relate to documents that are created in other modules."
docs.microsoft.com/.../case-management
The situation is not much different in Time and attendance, activities, Questions. You can see similar menus in more than one module, you need to use the menus in home for common use.
ellipsesolutions.com/.../
https://dyntips.com/ax2012ta/
