which of the following is true of folded mountains, fault-block mountains, and volcanic mountains?
form from the buildup of lava and ash
form only at boundaries between two oceanic plates
form only at boundaries between two continental plates
form at both convergent and divergent plate boundaries

Form at both convergent and divergent plate boundaries

Explanation:

The mountains that form mainly due to the folding of layers of earth in the crust part are known as folded mountains. The mountains that are formed by the movement of large crustal blocks due to the pulling apart force of earth's crust are known as fault-block mountains. Volcanic mountains are formed when a crack is formed in the earth which forms a volcanic vent.The thing that is common amongst all these three mountains is that they are formed at both convergent as well as divergent boundaries.