As we know that the plants is universal producer.Plant absorb CO2 from atmosphere by the help of photosynthesis from where plant make glucose ,oxygen and energy and then plant exhale O2 but in plants there is another process is going on called respiration which exhale same amount of CO2 as consumed in photosyntesis and in autumn the leaves fall on the soil which on later decomposed and release carbon dioxide this whole cycle is called carbon cycle !!
the simplest answer would be it makes a ecosystem more stable. you also have more variety witch helps incase a promblem occurs
Answer:
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C is the obvious answer because your body is full of simple machines, such as levers, pivots, and many more.