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.

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

Question: What astronomical phenomenon is often comprised of remnants of the earliest material that formed in the solar system? Answer: meteorites
Meteorites are often comprised of remnants of the earliest material that formed in the solar system.

Question: What is an important level of organization in ecology and the unit of microevolution? Answer: population

Population is an important level of organization in ecology and the unit of microevolution.