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

A: Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities.
****
Q: Question: What causes earthquakes at mid-ocean ridges to be small and shallow? Answer: plates are thin , young , and hot

A: Plates are thin , young , and hot causes earthquakes at mid-ocean ridges to be small and shallow.
****
Q: Question: What is manufactured and added to foods to preserve freshness? Answer: trans fat

A:
Trans fat is manufactured and added to foods to preserve freshness.
****