Answers by visitors named: Tiky

It might be D

i would say cookie...But everyone has spammed enough...So ill say the answer is B...(this was TIKY cookie approved!)

1. Convection Currents. 2. Mantle. 3. Earth’s rock plates collide with one another 4. A denser plate pushes down under a lighter plate. sorry if they are wrong for you :< but I got a 100%