An Attribute (called "Adjective" by certain grammar schools).
The part of speech that answers the question "which one" is a pronoun. Pronouns replace nouns in a sentence to refer to something or someone previously mentioned or understood in the context.
A question mark is a punctuation mark, not a part of speech. It is used at the end of a sentence to indicate that it is a question.
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The phrase "what part of speech is cake" is a question.
The word "which" functions as a pronoun. It is used to introduce a question that asks for a selection from a definite set of choices.
The part of speech for "answer" is a noun.
'from' is a preposition
adverbs
A question mark is a punctuation mark, not a part of speech. It is used at the end of a sentence to indicate that it is a question.
.
The phrase "what part of speech is cake" is a question.
Who in a question is a pronoun.e.g. Who is reading this?
adjective
the idea given in the speech or the question asked.
I think the answer to this question is a noun.
Cleverly is an adverb.
The word what is a pronoun. It is an interrogative pronoun.
Who, which and what are Interrogative Pronouns.