The answer would be (C.cat) because <span>For the cat has the most advanced biological system, whereas the unicellular algae and bacteria are microscopic in size, and while the ant does have a system and is a multi-cellular organism, the cat has a much more advanced biological system with many more functions and organs.
Hope it helps!
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Pollution and deforestation
Coal or oil are two of non renewable resources (:
Answer:
nitrogen fixation is the answer
