Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Matter that mechanical wave energy can only travel through is medium.

Output: What is the name of matter that mechanical wave energy can only travel through?


Input: Consider Input: Plasma membranes encloses and defines the borders of cells.

Output: What encloses and defines the borders of cells?


Input: Consider Input: Nonshivering thermogenesis, generating heat involves the breakdown of brown adipose tissue, is a special methods newborns have for what purpose.
Output: Nonshivering thermogenesis, which involves the breakdown of brown adipose tissue, is a special methods newborns have for what purpose?