TASK DEFINITION: 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.
PROBLEM: Question: What works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities? Answer: natural selection

SOLUTION: Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities.

PROBLEM: Question: What measurement of the wave is used to determine the magnitude of an earthquake? Answer: height

SOLUTION: The height of the wave is used to determine the magnitude of an earthquake.

PROBLEM: Question: Reactive elements are able to combine more what with other elements? Answer: easily

SOLUTION:
Reactive elements are able to combine more easily with other elements.