B . Excessive commercial fishing
Reason: the other options are good things this is the only bad thing
Explanation:
(X3+8)+( 2X2+ 4X)
(X+2)(X2-2X +4) + 2X(X+2)
(X+2)(X2-2X+4+2X)
(X+2)( X2+4)
The layers on the top may be younger, while the bottom layers may be much older.
Answer:
I think the answer is D
Explanation:
the tree roots helps to hold the dirt down plus the higher amounts od mositure make the dirt denser
