Collective nouns are words that describe a group of people, animals, or things as a single unit. They make it easy to talk about multiple things or beings together without listing each item separately.

Cleft sentences are sentences that are "split" into two parts, usually to emphasize a particular element or to clarify information. They are a common tool in English for highlighting a specific part of a sentence, such as the subject, object, or even time, place, or reason.