The hottest layers are closest to the core. The more liquid layers are closest to the crust. The lightest layers are closest to the core. The more metallic layers are closest to the crust.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these best describes the relationship between Earth's layers?
Possibilities:
- The hottest layers are closest to the core.
- The more liquid layers are closest to the crust.
- The lightest layers are closest to the core.
- The more metallic layers are closest to the crust.

The hottest layers are closest to the core.