What is a defining characteristic of a vegetarian?

A defining characteristic of a vegetarian is that they do not eat meat. This includes flesh from animals such as beef, pork, chicken, and fish. Vegetarians may still consume other animal products such as dairy and eggs, depending on their specific dietary preferences. This definition captures the essence of vegetarianism, focusing primarily on the avoidance of flesh.

The other options present different concepts. The second choice, which states that a vegetarian is a person who eats no animal food, incorrectly broadens the definition. While some vegetarians do avoid all animal products (making them vegans), the standard definition of vegetarianism allows for certain animal-derived foods. The third option, describing something as "very tasty," is unrelated to diet or vegetarianism at all. Lastly, the fourth option simply refers to the necessity of food for survival, which is a universal statement applicable to all humans, irrespective of their dietary choices. Therefore, the most accurate and relevant description of a vegetarian lies in the avoidance of meat.