Answer:
I think its All of the above
Step-by-step explanation:
I think the mantle would be as hot as the sun, I don't know if it is but the mantle right underneath the crust so I'm guessing its gonna be hot.
I think its All of the above because the mantle is make of rock, and I think that there is more iron than in the crust cause there is more space in the mantle than the crust, (the crust is just a thin layer around the earth) SO then that leaves, Is the mantle as hot as the sun? I would say yes. I'm not certain.. I couldn't find much information on the temp of the mantle and the sun. HOPE THIS HELPS <3