Question

A group of students are studying the Earth's mantle. They discover that the mantle is constantly moving. Which of these most likely causes the movement of the mantle?
A heating up of the mantle by the Earth's core
B heating up of the mantle by the Earth's crust
C rotation of the core material in a cyclic pattern
D movement of the mantle material in a cyclic pattern

Answer 1

it's rather going to be A or B, and I think it's A

Answer 2

Answer:

A. heating up of the mantle by the Earth's core

Explanation: