Answer:
tectonic plates
Step-by-step explanation:
The earth's crust - the outermost layer of planet Earth, formed by rocks - is subdivided into several “pieces”, which, despite being separate, are always in contact with each other. The set of these pieces is called tectonic plates.
Tectonism - also known as the movement of plate tectonics - has transformations that can be directly perceived by people on the earth's surface, such as earthquakes, the movement of continents, the formation of volcanoes and also the appearance of mountains.