You cant get rid of energy and matter in the ecosystem. Matter is recycled in the ecosystem if we get rid of that the ecosystem will die so we can't get rid of energy and matter because it helps our ecosystem.
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The correct answer is A i'd say. This is due to a process called diffusion.
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Answer:
The wheel and axle is a machine consisting of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.
The answer is c I’m pretty sure
