Final answer:
Plants can cause both physical and chemical weathering.
Step-by-step explanation:
Plants can cause both physical and chemical weathering.
Physical weathering occurs when plants exert pressure on rocks through their roots. As the roots grow, they can dislodge rock particles and create cracks and crevices in the rocks. Over time, this can lead to the breakdown of the rocks into smaller pieces.
Chemical weathering occurs when plants release acids and other chemicals through their roots and through the process of decomposition. These chemicals can react with the minerals in the rocks, causing them to break down and weather away.