They are herbivores that feed off of only plants. They only eat autotrophs so it cannot be c. And the other options are not true becuase those are meat eaters and A is something who feeds off of dead organic material. So D is your option.
Answer from: Quest
a. by using fur or clothes to trap heat energy near the body
The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a. coral reefs because of the loss of the symbiotic algae living within their bodies b. penguin populations because the fish they eat will move into warmer waters c. mountain-dwelling birds because rising sea levels will relocate their food sources d. large cats in the rainforest because of decreased habitat loss for their prey