Large is an Adjective
Fish is a Noun
Swim is a Verb
Swiftly is an Adverb
In is a preposition
The is a determiner
Sea is a noun.
I hope this helps since you didn't say which word is italicized.
Im just guessing a and b sorry if im wrong
Answer:
ok wow itss acting like i never existed :/ wonder whyyy
Explanation: