Dork is a noun.
it depends what word it is it could be any part of speech depending on the sentence
All subjects are part of speech for they are all nouns.
Him is a pronoun.
a sentence is a part of speech
Example sentence - His daughter is an antagonist who rarely misses an opportunity.
The action in a sentence is the part of speech known as a verb.
it depends what word it is it could be any part of speech depending on the sentence
regular speech
All subjects are part of speech for they are all nouns.
you
a sentence is a part of speech
Pronoun
Noun
Why is the beginning of a interrogative sentence.
Him is a pronoun.
In the sentence, "Which is his sister?", "which" is an interrogative pronoun.
Noun--however, many words have several possible parts of speech; please submit the Whole Sentence when asking for part of speech--cannot be sure without seeing how it is used in the sentence, as that's what determines the part of speech.