It is an adjective, as in a 'volcanic area'.
adverb
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
The part(s) of speech that has an "A" sound are: Adjective and Adverb.
An adjective. As in 'types of volcanic activity'
If this word is legitimate, it is probably an adjective. A more common form is "volcanic".
is a volcanic eruption part of the rock cycle
is a volcanic eruption part of the rock cycle
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.