How do animals and people cause weathering?

How do plants cause weathering ?

Plants can cause mechanical and chemical weathering

Explanation:

Plants can cause mechanical and chemical weathering. When plants cause mechanical weathering, their roots grow into rocks and crack them.It can also happen in streets or sidewalks. When plants cause chemical weathering, there roots release acid or other chemicals, onto rocks, which then forms cracks, and breaks apart.

preservation because he preserves part of the land and preserves means save

explanation:

digestion

it excretes wastes