Which is the most likely to cause rocks to brack down?

Weathering is the most likely process to cause rocks to break down. This can occur through physical means, such as freeze-thaw cycles and abrasion, or through chemical means, like acid rain and oxidation. Additionally, biological factors, such as plant roots growing into cracks, can also contribute to the breakdown of rocks. Together, these processes lead to the gradual disintegration of rock material over time.