Final answer:
Plate boundaries are the edges where tectonic plates meet and interact with each other. There are three main types of plate boundaries: divergent boundaries, convergent boundaries, and transform boundaries.
Step-by-step explanation:
Plate boundaries are the edges where tectonic plates meet and interact with each other. There are three main types of plate boundaries: divergent boundaries, where plates move away from each other; convergent boundaries, where plates collide with each other; and transform boundaries, where plates slide past each other. The movement of the plates at these boundaries can cause various geological phenomena such as earthquakes, volcanoes, and the formation of mountain ranges.