Here's why:

* Convergent Plate Boundaries: When two tectonic plates collide, the immense pressure can cause the rock layers to bend and buckle, forming folds. This is particularly true when two continental plates collide, as they are both relatively buoyant and resistant to subduction. The Himalayas, for example, are a massive mountain range formed by folding along a convergent plate boundary.

* Other Locations: While folds are most common at convergent boundaries, they can also form in other areas, though less frequently:

* Near faults: Stress along faults can cause localized folding.

* Areas of uplift: Upward forces can create folds within areas that are being pushed upwards.

* Sedimentary basins: The weight of overlying sediments can sometimes cause folding in deeper layers.

Key takeaway: Folds are most prevalent at convergent plate boundaries due to the intense compressional forces involved.