When plates move it can cause the surface of the earth to change in appearance

The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle and fit snugly against one another. The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other.

This is true, it can cause many geographical landforms to form, such as cliffs, mountains, etc.

Idont understand i'm sorry

Active site is where they touch.