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: Reid notices no change in the weather and temperature from 100 years ago. This likely was caused by _____ greenhouse gas levels. 
 Answer: decreased

A: As greenhouse gases increase, changes will be more extreme.
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Q: Question: If Milo is travelling underground and he moves closer to the Earth's surface, what happens to the pressure around him? 
 Answer: decreases

A: Pressure: Pressure increases with depth, but increased pressure raises the melting temperature, so melting of rock is less likely to occur at higher pressures.
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Q: Question: Reid has a very fit genotype. If he compares this genotype to an even more fit genotype, his would be more likely to pass _____ copies of their alleles down. 
 Answer: less

A:
Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.
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