Question

What is the difference between the food habits of organisms belonging to the first and the third tropic level ? Give an example of organism at each trophic level.

Answer 1

organisms of 1st tropic level prepare their own food using photosynthesis. ex: all green plants.
organisms of third tropic level depend on 2nd tropic level for their food. ex: fox.
example of a food chain:
green plants(1st tropic level) -> rabbit(2nd tropic level) -> fox(3rd tropic level)