Answer:
A to meet needs through collective effort
Explanation:
Picture as proof
Shleiden and Theodor Schwann were the first to recognize that all plants and animals are composed of cells.
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Frogs are cold blooded and most camouflaged frogs are nocturnal
<span>Excess nitrogen is brought in the pond from the fertilizer, which are ladden in nitrogen and phosphorous, and rain water or running water takes that nitrogen to the water bodies.Bacteria must have come from the sewage disposal in the pond. Sewage is rich in organic material and allows proliferation of bacteria, which is taken to the pond when the sewage is disposed in the pond.</span><span />
