A:
If the report is solely informational (for example, reporting what the committee has done), no motion is usually necessary.
If a report is adopted, it becomes the statement of the assembly, not just the committee.
Adoption of a committee report should be a rare event.
It says, in effect, that the assembly agrees with everything the committee has reported - including the facts and opinions.
Instead, the committee's report is usually just filed with the Secretary.
In no case should the reporting member preside; that's the job of the President.
If it's desired that the report be adopted, then after the report is given, a member other than the reporting member should move its adoption, and another member second it.
The President will conduct any debate and vote.
For the rules on how to receive and handle reports of committees, see RONR pp. 501-21.