Answer:
an adverb
Explanation:
Swiftly would be an adverb because it is describing the verb flies. An adverb is any word that describes a verb. A helpful way to help find them is that they usually end with an -ly, but remember that not all adverbs end in -ly.
If deku had to choose he should choose baku.
This could mean that William's father lived his life 'inside his shell', or isolated from others.