Infer Why is a mechanism needed to remove carbon
dioxide gas from your cells?

^^ what he said. carbon dioxide, if there is enough in our body, can eventually kill us. it can be seen with deep sea divers, which after several continuous deep dives can have a excessive amount of carbon dioxide in there body to a lethal amount, having to force them into special rooms which allows the deep sea divers to decompress slowly and remove a good bit of the dioxide to lower the amount in them.

Alpha particles have positive charge, beta particles have negative charge, and answer 4 just doesn’t make sense. thus, you are left with only one possible answer.