Answer the following question: Fact 1: Ethologists usually study how animals behave in their natural environment. Fact 2: Ethologists study animal behavior. Given the two facts above, what studies how animals behave in their natural environment?

Choices: a. resistance activities. b. that material's properties. c. it keeps an organism warm. d. A computer. e. it's state. f. behavioral studies. g. electromagnetic energy. h. by making heat.
Answer:
f.