Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: Loudness refers to how loud or soft a sound seems to a listener. The loudness of sound is determined, in turn, by the intensity, or amount of energy, in sound waves. The unit of intensity is the decibel (dB). Answer: decibel
[EX A]: What is the term used to measure the intensity of sound waves?

[EX Q]: Passage: A front forms at the boundary between two air masses. Types of fronts include cold, warm, occluded, and stationary fronts. Clouds, precipitation, and storms commonly occur along fronts. Answer: a front
[EX A]: What forms at the boundary between two air masses?

[EX Q]: Passage: Animal behavior is any way that animals interact with each other or their environment. Many animal behaviors promote fitness by increasing the chances of surviving or reproducing. If such behaviors are controlled by genes, they evolve by natural selection. Answer: animal behavior
[EX A]:
What term is used to describe the way that animals interact with each other or their environment?