Amy made the table shown to describe two processes. Amy's Table
Process A: A rock crumbles easily when oxygen reacts with some substances present in the rock

Process B: Plants grow through the cracks in rocks and break the rocks apart

Which statement is true about the processes described in the table?
Group of answer choices

1: Both Process A and Process B represent physical weathering.

2: Both Process A and Process B represent chemical weathering.

3: Process A is physical weathering and Process B is chemical weathering.

4: Process A is chemical weathering and Process B is physical weathering.