A solid changes to a gas. A liquid changes to a gas. A solid changes to a liquid. A liquid changes to a solid.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following changes is caused by removing heat?
Possibilities:
- A solid changes to a gas.
- A liquid changes to a gas.
- A solid changes to a liquid.
- A liquid changes to a solid.

A liquid changes to a solid.