WHO HAS BIG BRAINS? not me... so please help? What is isostasy dependent on a balance between?

A.)the downward push of the mantle and the upward push of the continents

B.)The downward push of the ocean floor and upward push of the continents

C.)The downward push of the continents and upward push of the mantle

D.)The downward push of the ocean floor and upward push of the mantle

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.