Pick from: a). garbage b). Generating heat c). Space travel d). running and lifting e). Time and energy f). exercise g). money h). Riding a bike
Given those answer options, answer the question: Fact 1: Playing is one way mammals and other animals learn how to behave. Fact 2: Involvement in play takes time and energy. Given the two facts above, what is one way animals learn to behave?
A:
e).