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.

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

[EX Q]: Question: What kind of reaction adds water to an organic molecule and breaks the large molecule into smaller molecules? Answer: hydration reaction
[EX A]: Hydration reaction kind of reaction adds water to an organic molecule and breaks the large molecule into smaller molecules.

[EX Q]: Question: Where does the heartbeat originate in vertebrates? Answer: the heart
[EX A]:
The heart does the heartbeat originate in vertebrates.