• As pressure from the earth's crust increases, the top layer of the rock cracks.
• As water in cracks of rocks turns to ice, the crack becomes larger.
• As plant roots in cracks of rocks grow, the crack grows as well.
• As rocks being moved by wind hit other rocks, the rocks being hit are broken down.
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The statement that outlines the effects of root wedging is:
• As plant roots in cracks of rocks grow, the crack grows as well.
This describes how the physical growth of plant roots can exert pressure on the surrounding rock, leading to the widening of existing cracks.
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