In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: Because trees add water vapor to air, cutting down forests leads to longer periods of what? Answer: drought

A: Because trees add water vapor to air, cutting down forests leads to longer periods of drought.
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Q: Question: What is the ratio of solutes in a solution to a volume of solvent in a solution known as? Answer: osmolality

A: Osmolality is the ratio of solutes in a solution to a volume of solvent in a solution.
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Q: Question: Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this? Answer: their external skeleton

A:
Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this?
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