which phrase describes a lava plateau?\nsteep - sided mountain\ngently sloping mountain\nhardened magma in a…

Answer:

gently sloping mountain

Brief Explanation:

A lava plateau is formed from repeated lava - flows. It has a gently sloping surface as the lava spreads out over a large area. A steep - sided mountain is not characteristic of a lava plateau. Hardened magma in a pipe is related to volcanic necks, not lava plateaus. Volcanic material in valleys is not the description of a lava plateau.