The grouping of rocks as igneous, sedimentary, and metamorphic is based primarily upon differences in what

The correct answer is - texture and composition.

Explanation:

The classification of the three types of rocks as igneous, sedimentary, and metamorphic rocks is primarily based upon the components and the texture. The sizes and shapes of grains of the mineral and other components and how they interact are present are known as texture.

Igneous rocks - melted rock deep inside the Earth.

Sedimentary rocks - layers of sand, silt, dead plants, and decomposed organism and their skeletons.

Metamorphic rocks - changed by heat and pressure underground

✿   this landform has a high elevation and a high relief

✿   this landform is a mountain