Fill in the blank... Question: Matter ecosystems.

Options:
A. flows out
B. is found only in
C. stays in the same parts of
D. cycles around​

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements