human
Question: Some of the thermal structure of Earth is the result of a combination of chemical composition, temperature, and pressure. Which is a boundary that best demonstrates a contact point between layers having relatively the same temperature and chemical composition?

Choices:
A) lithosphere and mesosphere
B) inner core and outer core
C) outer core and mantle
D) mantle and crust
gpt
The correct answer is 1: inner core and outer core.