What is the breaking of rocks due to constant expansion and contraction called?

Ice wedging, pressure release, plant root growth, and abrasion can all cause mechanical weathering. in the cracks and pores of rocks, the force of its expansion is strong enough to split the rocks apart. This process, which is called ice wedging, can break up huge boulders.

Mechanical weathering.

Explanation:

Just did a quiz. This question was word for word and I correctly answered it. No doubt it is Mechanical weathering.