If you see a dark mass similar to a blown-up balloon at the top of a volcano, what type of feature are you most likely viewing? a lava dome

a flood basalt plateau

a geyser

a newly formed island

Sorry I marked it as physics, because it should be science but there isn't a subject for that :(

Lava dome

Explanation:

A geyser is hot water being shot up from the ground

A newly formed island would be somewhere on the ground not directly above  a volcano (Well depending on where the volcano is anyways)

A flood basalt plateau is like rocks I think?

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible