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: Similarity in biochemicals, like the glucose used by virtually all living things for energy, provides evidence of what? Answer: evolution
[EX A]: Similarity in biochemicals, like the glucose used by virtually all living things for energy, provides evidence of evolution.

[EX Q]: Question: Melanocytes are located in which layer of the epidermis? Answer: bottom
[EX A]: Melanocytes are located in the bottom layer of the epidermis.

[EX Q]: Question: Why does ice wedging occur? Answer: water expands
[EX A]:
Ice wedging occurs because water expands.