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

The male reproductive system consists of structures that produce sperm and secrete testosterone.
What does the male reproductive system consist of?

Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain.
What is the term for the skeletal structure of the head that supports the face and protects the brain?

A mineral is described as a solid natural material with a crystal structure.

Which of the following best describes a mineral?