How can living things cause chemical weathering?

a. growth can force things aside.
b. they can produce biological acids.
c. living things only cause physical weathering.
d. they can push and crack rocks with their movements.

How can living things cause chemical weathering?

A. Growth can force things aside.

B. They can produce biological acids.

C. Living things only cause physical weathering.

D. They can push and crack rocks with their movements.

answer; i believe the correct answer is (fluctuated);