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: The outer surface of the heart changes from positive to negative during what? Answer: depolarization
The outer surface of the heart changes from positive to negative during depolarization.

Question: What disease is unpreventable in the type one form but may be prevented by diet if it is of the second type? Answer: diabetes
Diabetes is unpreventable in the type one form but may be prevented by diet if it is of the second type.

Question: When electrons return to a lower energy level, they emit the excess energy in the form of what? Answer: light

When electrons return to a lower energy level, they emit the excess energy in the form of light.