Question

What activates a convection current, starting the flow of a fluid?

A.
cold temperatures at the north pole

B.
heated liquids at the earth’s surface

C.
iron-rich rocks in the mantle

D.
temperature differences in the mantle

THIS IS FOR SCIENCE

Answer 1

the answer is "D temperatures different in the mantle"

Step-by-step explanation:

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Answer 2

The thing that activates a convection current, starting the flow of a fluid is D) temperature differences in the mantle.