4. In a food chain,
A the number of organisms increases at each
higher level.
® each level contains only about 10 percent
of the energy present in the previous
level.
© only the heterotrophs are included.
0 consumers serve as the base.

b

Explanation:

a is wrong bc the number organisms actually decrease significantly at each level. and c is wrong also. however b is right bc there must be more foood available for the lower levels so that the required energy is available.

weathering is the answer.

not sure if this is what you'r looking for nnew= nold