What primary effect results from tectonic uplift?

Tectonic uplift primarily leads to the raising of the Earth's crust. This process occurs when tectonic forces, such as those that happen at convergent plate boundaries where plates collide, cause sections of the Earth's lithosphere to be pushed upward. As the crust is uplifted, it can result in the formation of mountain ranges and elevated plateaus.

While increased volcanic activity can be associated with tectonic processes, it is not a direct effect of uplift but rather a consequence of subduction or melting of mantle rock. Similarly, the creation of new ocean basins is associated with divergent plate boundaries, where plates pull apart rather than being uplifted. The thinning of continental crust is typically a result of extensional forces, not uplift. Thus, the correct answer emphasizes the direct outcome of tectonic uplift, which is the raising of the crust itself, reflecting the dynamic nature of Earth's surface processes.