Final answer:
A peer reviewer is least likely to participate in conducting his or her own research in the same subject area.
Step-by-step explanation:
A peer reviewer is least likely to participate in Task A: conducting his or her own research in the same subject area. Peer reviewers are responsible for providing feedback on the quality of the draft, looking for flaws in the study's design or methodology, suggesting potential publishers, and verifying that the research meets ethical standards. Conducting their own research would be outside the scope of their role as peer reviewers.