Final answer:
The theory describing the continuous movement of the Earth's crust is Plate Tectonics, which explains the drifting of continents and the formation of large geological features. The correct answer is option: a) Plate Tectonics.
Step-by-step explanation:
The theory that states the entire crust is broken and is continuously moving is a) Plate Tectonics. This theory explains the movement of large segments of the Earth's crust through slow motions within the mantle, leading to the gradual "drifting" of continents, as well as the formation of mountains and other geological features. Plate tectonics also serves as a cooling system for the planet by transporting heat from the interior to outer space. Tectonic plates cover Earth's surface and shift slowly, which can cause earthquakes and volcanic activity when they interact.
For instance, one of these plates has an average speed of 4.0 cm/year. This corresponds to a very slow rate of movement, akin to the speed at which hair grows. The complex dynamics of these plate movements are integral to understanding many geographical and geological processes that shape our world.