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.

Example Input: Question: If a substance does not release molecules into the air from its surface, it will not have what? Answer: smell
Example Output: If a substance does not release molecules into the air from its surface, it will not have a smell.

Example Input: Question: What occurs when a population reaches the carrying capacity? Answer: growth stops
Example Output: Growth stops when a population reaches the carrying capacity.

Example Input: Question: How does heat travel from the sun to the earth? Answer: thermal radiation from the sun
Example Output:
Heat travels from the sun to the earth thermal radiation from the sun.