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: Overharvesting is a serious threat particularly to which species? Answer: aquatic species
Overharvesting is a serious threat particularly to aquatic species.

Question: What is the key to the demographic transition? Answer: reduced family size
Reduced family size is the key to the demographic transition.

Question: The temperature at which all molecular motion has ceased is called what? Answer: absolute zero

The temperature at which all molecular motion has ceased is called absolute zero.