The most useful advantage of adding a vegetarian hot-food option to a school lunch menu is

A vegetarian hot-food option gives students who avoid meat—whether for health, religious, ethical, or other dietary reasons—another suitable lunch choice. It does not necessarily reduce food waste or lower prices, and the main benefit is not specifically for teachers and staff. The best answer is providing an additional choice for students on restricted diets.

AI-written and checked against the verified answer.