Question

Which area of Earth is most similar to the sun’s convection zone?

Answer 1

The mantle is most similar to the sun’s convection zone. The Sun's convection zone is dominated by convection currents that carry the energy outward to the surface.The Mantle is the second layer of the Earth.  Same as in the sun's convection  zone convection currents happen inside the mantle and are caused by the continuous circular motion of rocks in the lithosphere.

Answer 2

I would say the correct answer is the third option. The area of the Earth that is most similar to the Sun's convection zone would be the mantle. The convection zone of the sun is its outermost layer where heat transfer by convection happens which is similar to the Earth's mantle.