How does seafloor spreading provide further evidence of continental drift

Tectonic plates is caused by the immense heat of the earth's core that travel's through convection. 

A convergent boundary is a destructive plate boundary. It is a region where two or more tectonic plates move towards each other and collide. A good example of this is the San Andreas fault off the West Coast of America. When these plates collide, they can either cause an earthquake or a volcano to erupt. The intensity of the earthquake or volcano eruption depends on the speed at which the tectonic plates collide

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings.