The word his is employed either as a pronoun or an adjective, and it is a possessive pronoun that is utilized in place of a noun phrase, which starts with a possessive adjective. They are used to eliminate the repetition of noun phrases or nouns. For example, you could say, “He pet his dog.”
The word his is used to demonstrate ownership, and in the second sentence, it is used as an adjective determiner. The word him, on the other hand, is the objective form of the pronoun “he.” It is used as an object of a verb or a preposition.
It contrasts from the subjective pronoun, which is the initiator of the verb or the performer of the action. The word him refers to a person who was introduced and is identified as the one being described. You could say, for example, “From what I know of him, he is quite a nice guy.”