Which part of speech is the underlined word in the sentence? food is an important part of any festival. ( of is the underlined word )

a. interjection

b. adverb

c. preposition

d. conjunction

C. prepostion
a word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause, as in “the man on the platform,” “she arrived after dinner,” “what did you do it for ?”

C. Preposition

Explanation:

A preposition is showing what a word belongs to. "Of any festivial" Shows the word "of" belonging to "any festival."

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Phone prices dropped, quality increased, and renting phones faded away. The other significant benefit of the breakup of AT&T was competition in long-distance phone service. The Baby Bells allowed consumers to choose among long-distance carriers. Companies like MCI and Sprint (S) challenged AT&T in this market.

Explanation: