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: If a dog is extremely unfit and unhealthy breeders will want it to have 
 Answer: less offspring

A: Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.
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Q: Question: If an animal is able to eat food more difficult is it more or less likely to reproduce? 
 Answer: less

A: Natural selection is the process by which living things with beneficial traits produce more offspring, so their traits become more common over time.
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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.
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