Question

a food web is more realistic because a snake: eats more than just frogs has multiple adaptations just feeds on birds

Explanation:

A food - web represents multiple feeding relationships. Snakes have diverse diets and don't just eat one type of prey. A food - web accounts for this by showing that snakes eat more than just frogs, making it more realistic. Adaptations are not related to why a food - web is more realistic in this context, and snakes don't just feed on birds.

Answer:

A. eats more than just frogs