Final answer:
Zaiden is enacting the revising step by deleting an off-topic section to refine the focus of his report.
Step-by-step explanation:
Zaiden is engaging in the revising step of the writing process. This step involves major changes to the content and structure of a draft, such as deleting an off-topic section. Revising allows the writer to clarify his thesis statement, check the relevance of his supporting evidence, and ensure that the conclusion is both logical and strong. The revision step occurs after drafting, and before the final editing and proofreading phases, making it a crucial stage for refining the overall coherence and focus of a piece of writing.