How do hydrochloric acid and bile salts digest food?

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?