Phosphorus is an essential nutrient for plants and animals. phosphorus normally occurs in nature as part of a phosphate ion (po4)3. as you can see from the diagram of the phosphorus cycle, unlike many other biogeochemical cycles, the does/do not play a significant role in the movement of phosphorus.
a) oceans
b) atmosphere
c) groundwater
d) food chains

the correct answer is:

a population changes in response to a change in the environment.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.