Movements in the crust that cause faulting or folding of rocks are called tectonic activity.

Here's a breakdown:

* Tectonic plates: The Earth's crust is made up of large, moving pieces called tectonic plates.

* Tectonic activity: The movement of these plates, often driven by convection currents in the Earth's mantle, is called tectonic activity.

* Faulting: When tectonic plates move past each other, they can cause breaks in the Earth's crust called faults.

* Folding: When tectonic plates collide, the rock layers can buckle and bend, creating folds.

So, tectonic activity is the overarching term for the processes that cause faulting and folding.