What is part of speech of his?

Answer 1

Huh noun

Answer 2

"His" is a determiner.

Yes, "his" is a determiner, but let's be clearer. "His" is a possessive pronoun that often functions as an adjective; for example, his book is heavy. "His" gives information about the book. "Determiners" are types of adjectives. "His," while still a pronoun, can function as the subject of a sentence: His is scary. When using a pronoun in this fashion, especially a possessive pronoun, you have to make sure the reader knows what "his" is referring to; therefore, establish the subject before referring to it.

Answer 3

Hi is an interjection, an exclamation of greeting. It is a short form of the word "hello."

Answer 4

His is a possesive noun