Which option is the correct singular form of this sentence: "Mothers love their children."?

A part of speech that is used to identify a person, place, animal, or thing is known as a noun. Based on the number of nouns, it can take two forms, singular, and plural. For one person, place, animal, or thing, a singular noun is used; for more than one person, place, animal, or thing, a plural noun is used. The singular of 'mothers' is 'mother', and that of 'children' is 'child'. Thus, the singular form is 'A mother loves her child."