B. is the answer i really hope i helped please mark as brainliest.
Mitosis<span> plays an </span>important<span> part in the life cycle of most living things, though to varying extents. In unicellular </span>organisms<span> such as bacteria, </span>mitosis<span> is a type of asexual reproduction, making identical copies of a single cell. In </span>multi-cellular organisms<span>, </span>mitosis<span> produces more cells for growth and repair.</span>
More co2 gas would be found in earth’s atmosphere.Because of less oxygen produced by plants
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I think that 3 is C and 2 is B