Which phrase explains what the arrows show? how convection currents move in Earth's interior the location of heated material near Earth's surface where plates move as material cools in the outer core why the densities of materials remain constant at different layers

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.