-Frozen water that covers the ocean.

How do you think it is affected by human activities?

swimming,fishing,

Explanation:

which

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

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements

answer///(c) the maximum number of organisms an environment can support for a long time; i believe this is correct, plz check luck;