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

Input: Consider Input: Ultimately, the fluid that is lost from the blood vessels is returned through what system?

Output: lymphatic

Input: Consider Input: Strong, stable bonds between carbon atoms produce complex molecules containing chains, branches, and rings; the chemistry of these compounds is called what?

Output: organic chemistry

Input: Consider Input: What is made from the minerals in rocks known as bauxite?
Output: aluminum