What do tectonics primarily do?

Tectonics primarily refer to the deformation of the Earth's crust and mantle due to the dynamic processes that occur at tectonic plate boundaries. This involves a variety of activities such as the folding, faulting, and breaking of the Earth's crust as well as the movement of the mantle beneath it. The interaction of tectonic plates—whether they are converging, diverging, or sliding past each other—creates stress that leads to deformation. This is pivotal in geological processes that shape landscapes, lead to the formation of mountains, valleys, earthquakes, and volcanic activity.

The other choices do not accurately capture the main function of tectonics. While tectonics can indirectly influence the formation of continents over long periods, that process is a result of the deformation and movement of plates rather than a direct function of tectonic activity. The creation of ocean currents is primarily related to atmospheric conditions and the Earth's rotation rather than tectonic processes. Lastly, tectonic plates do not move faster; they move at a relatively constant rate, typically a few centimeters per year. Therefore, the primary role of tectonics lies in their ability to deform the crust and mantle, making the selected answer accurate.