Question

Volcanic arcs Choose one: A. form where subduction takes place. B. are long, curving mountain chains adjacent to mid-ocean ridges. C. occur at divergent-plate boundaries. D. are only continental.

Answer 1

Answer:

A. Forms when subduction takes place

Explanation:

A chain of volcanoes that appears like an arc when seen from above and are formed above a sub ducting plate. they are formed due to rising magma erupting due to melting of the down going plate.

They are curved due to the curvature of Earth, Andes mountains are a volcanic arc, they are different from the hotspot volcanic chains, in hotspot volcanic chains the volcanoes form in the middle of a tectonic plate. There are two types of volcanic arcs: Oceanic arcs and continental arcs.

Answer 2

Answer:

A. form where subduction takes place.

Explanation:

Volcanic arcs -

It refers to the group of volcanoes , that are formed above the subducting plates , is referred to as volcanic arcs .

In most of the cases , they are formed from the subduction of an oceanic tectonic plate .

Various offshore volcanoes form island , referred to as the volcanic island arc.

Hence , from the given information of the question ,

The correct answer is A.