Two species of treefrogs. Gray Treefrogs and Green Treefrogs, both eat insects, live off the ground on vegetation and lay their eggs in small pools.
However, they live in different habitats. The Gray Treefrogs live on tree
trunks in forested areas, while the Green Treefrogs live on the plants in
swamps and marshes.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.