Question: which are belongs to plural nouns?
Answer:  To make regular nouns plural, add ‑s to the end. ...   If the singular noun ends in ‑s, -ss, -sh, -ch, -x, or -z, add ‑es to the end to make it plural. ...   In some cases, singular nouns ending in -s or -z, require that you double the -s or -z prior to adding the -es for pluralization.