Given a scientific question, generate a correct answer to it.

Example Input: Lava that enters the water is called what?
Example Output: pillow lava

Example Input: The combined gas law involves three properties of a gas - volume, absolute temperature, and what?
Example Output: pressure

Example Input: Lack of what mineral causes rickets?
Example Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
calcium

