Question

In the following sentence identify the part of speech f the italicized word.

Catching fish is one of the oldest pastimes.
A) Preposition
B) Adverb
C) Conjuction
D)Verb

Answer 1

Since you didn't italicize any word, I will just write every part of speech here.
Catching is a gerund/noun, fish is a noun, is is a verb, one is a number, of is a preposition, the is a determiner, oldest is an adjective, pastimes is noun.