Which of the following monomer is used as the main source of energy

7th grade question (easy) look at the diagram of the food web. the arrows mean eaten by. what would happen if the number of snakes went down? answer choices are in the image.

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring