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.
The sea can act as a temperature regulator because it takes in heat energy in the summer but the land can’t do that (the suns rays are mostly reflected) so temperature isn’t kept as constant