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: What's the best way humans can conserve water? Answer: use less
[EX A]: The best way humans can conserve water is to use less.

[EX Q]: Question: Which statement best describes the Law of Superposition? Answer: In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
[EX A]: The law of superposition is best described by: in undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

[EX Q]: Question: Corals build hard exoskeletons that grow to become what? Answer: coral reefs
[EX A]:
Corals build hard exoskeletons that grow to become coral reefs.