What is the link between nitrogen cycle and phosphorus cycle?

Decomposition of biological waste by microbes can return nitrogen to the atmosphere. Nitrogen is mainly used by humans as a fertilizer in farmlands, but its excessive usage can lead to serious problems (such as eutrophication). The phosphorus cycle involves the uptake of phosphorus by organisms.

Explanation:

the answer is d (apex) good luck : ))

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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