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.

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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the answer you are looking for is the united states forest service.

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