Question

What are the earths principal biological system?

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Answer 1

$\huge\sf{A᭄nswer:-}$

The earth has four principal biological systems. These are: $\tt\pink{fisheries}$, $\tt\pink{forests}$, $\tt\pink{grasslands}$ and $\tt\pink{croplands}$.❤

Answer 2

Answer:

there are four biological system in our Earth . the system are grassland, forest, fisheries and cropland