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: An decrease in birth rates indicates a/an _____ in the food supply. 
 Answer: decrease

A: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.
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Q: Question: Allen is riding his bike on a path. The course ends up 1000 feet lower above sea level compared to the beginning. At which point is the air resistance lower? 
 Answer: at the beginning

A: At higher elevations, there is less air to press on a given area.
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Q: Question: If Milo is part of a larger population then Jerry is, which person's population will experience greater drifting of allele frequencies? 
 Answer: Jerry

A:
The smaller a population is, the more allele frequencies may drift.
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