Question

which type of weathering is caused by plants?
○ both mechanical and chemical weathering
○ ice wedging
○ mechanical weathering
○ chemical weathering

Explanation:

Plants cause both mechanical and chemical weathering. Mechanically, roots grow and expand, breaking rocks (mechanical weathering). Chemically, plant acids (like from root exudates or decaying plants) can dissolve minerals in rocks (chemical weathering). Ice wedging is caused by water freezing, not plants. So the correct option is the one stating both.

Answer:

A. both mechanical and chemical weathering