Question

which resource is a renewable resource?
trees
metal
gemstones
coal

Explanation:

Renewable resources can be replenished naturally over time. Coal, metal, and gemstones are non - renewable (formed over long geological periods and finite). Trees can be replanted and regrow, so they are renewable.

Answer:

trees (the option corresponding to "trees" among the given options: coal, gemstones, metal, trees)