The answer is; Mantle
Convection currents in the mantle drive tectonic plate movements. The convection currents in this regions are like those of water. The cooler upper mantles sink to the bottom and the hotter lower mantle rises. This circulation causes fiction drag with the overlying crust and therefore causes it to drift.
I’m confuse between A and B but I think it is mostly B
Hello!
The heart is kind of like the "base" or "hub" for blood. The heart will send of blood and receive blood, and send it off again. It allows for blood to be bumped through the whole body.
I hope this helps!
