Question

rock with crack water enters cracks, freezes and expands the crack. cracks deepen. more water enters and freezes. repeated freeze and thaw breaks up rock along the joint lines. this illustration best describe the mechanical process that breakdown the rocks. what type of mechanical weathering involve in this process? acid rain plant roots rock falls frost wedging

Explanation:

The illustration shows water filling rock cracks, freezing and expanding, then repeated freeze-thaw cycles breaking the rock. This matches the process of frost wedging, where water's expansion upon freezing pries rocks apart. Acid rain is chemical weathering, plant roots involve biological growth, and rock falls are a result of weathering, not the process itself.

Answer:

frost wedging