Should hydrogen be a non-metal or metalloid, because it has some conditions like metals, more like non-metals, but also some like metalloids, and they change to be more like metalloids as temperature decreases.

Yes but Hydrogen is a gas and there is no such thing as gaseous metalloids, therefore it is a non-metal

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

The answer is b because c don't explain why the moths are on them and it isn't a because as we know only one species of moth does this