Why is deamination important for the body?

The correct option is It prevents the accumulation of excess amino acids. This answer is correct because it matches the approved learning objective to describe (HT only) deamination in the liver as removal of the amino group from excess amino acids to produce ammonia in the subtopic Maintaining water and nitrogen balance in the body (biology only).

The correct option is It prevents the accumulation of excess amino acids. It prevents the accumulation of excess amino acids is correct because it directly supports the approved learning objective to describe (HT only) deamination in the liver as removal of the amino group from excess amino acids to produce ammonia. This belongs to the subtopic Maintaining water and nitrogen balance in the body (biology only) within Hormonal coordination in humans, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Maintaining water and nitrogen balance in the body (biology only).