Detailed Instructions: In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
Q: Question: Mikey is studying the mesosphere. He is looking at temperatures at various altitudes within this layer of the atmosphere. If he took the temperature at 31 miles above the Earth's surface, and then again at 40 miles above the Earth's surface, the temperature would be higher at a height of
Answer: 31 miles
A:
In the mesosphere, temperature decreases as altitude increases.