Sentence Correction

Hi all,

This is a Question from SC Grail

A new breed of investor, among private equity firms, hedge funds, and activist
shareholders,is aggressively looking for opportunities to create value from portfolio
moves in companies that the older investors regard as too passive.

My question is, should the word "A new breed of investor" be Singular or plural?

The word investor shows that this word is singular but dosen't having "A" infront of anyword makes it Plural?

Kindly clarify this basic question between classifying words to singular and plural by looking at starting letters like THE and A?

-Thanks

The article "a" is used ONLY before singular (countable) nouns. So in this sentence the phrase "a new breed of investor" must be singular.

The article "the" is used both with singular and plural nouns.