Question

how do plants affect erosion do they affect weathering in the same way

Answer 1

plant help in binding the soil and protect it from further erosion.
weathering is a process through which the rock is breakdown and form the soil no they are not affect the weathering

Answer 2

Plants help reduce soil erosion. Its roots hold the soil tight together so it won't be carried away by wind, water, etc. Plants also cause weathering when its roots go deep into the soil and break the rocks.
Hope this helps! :-)