Idc what vocab you use bestie, ill give you brainliest if you answer both of them :))

1. What is happening that is a convergent boundary, here what happen is that the mountain range its pushed by the other, so this two plate collide and a mountain range is pushed up.

2. These supports the teory of thectonic plates because they basically thougth that all the continents where one these teory is called pangea between so they in time separtated and know they are 7 different continens

I dont know if the second one its what your teacher was asking but hope this somehow helps :)

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.