Question

what is the main objective of removing margins around a tumor during surgery? confirming diagnosis preventing metamorphosis eliminating residual cancer cells ensuring patient comfort

Explanation:

When removing margins around a tumor during surgery, the key is to get rid of any remaining cancer cells. Confirming diagnosis is usually done via biopsy before major surgery. "Preventing metamorphosis" is not a relevant term in this surgical context. Ensuring patient comfort is a general aspect of care but not the main objective of removing tumor margins. The main goal is to eliminate residual cancer cells to reduce the risk of recurrence.

Answer:

eliminating residual cancer cells