Final answer:
Magma that is rich in feldspar and silica is called felsic. Felsic magmas produce igneous rocks that have light colors due to their high nonferromagnesian mineral content and often create rocks like granite or rhyolite. option d is correct
Step-by-step explanation:
Magma that is rich in feldspar and silica is referred to as felsic. This type of magma forms igneous rocks that contain high amounts of quartz, muscovite, and potassium feldspar with possible traces of biotite and Na-rich plagioclase. Felsic rocks, like granite or rhyolite, contain a large number of nonferromagnesian minerals which give them a light color. On the other hand, mafic rocks are rich in magnesium and iron, featuring abundant pyroxene, olivine, and amphibole, and tend to be darker due to the dark-colored ferromagnesian minerals present.
An example of a felsic rock is rhyolite, which is similar to granite in chemistry and mineralogy but has a very finely crystalline texture due to the quick cooling of the high-viscosity lava. Felsic rocks are often light gray, pinkish, or somewhat reddish in color. These igneous rocks are usually high in silica content which contributes to their viscous nature and light coloration. option d is correct