Whats the word for this? the theory that the plates of earth crust move due to the movement of magma and earth mantle.

The answer your looking for is plate tectonic theory it says that the outer layer has a ton of plates that shift around and when they colide they can make mountains

Answera discharge of static electricity;

The correct answer is (a.) in the coming years, the reyes family will save money because solar power requires little maintenance, and the energy used is free.