Pls ! will give brainliest, 5 stars, and

how are large polymers formed?
by repetitive combinations of simple subunits
by the addition of halogens to a small molecule
by combining a few different and larger molecules
by combining many different and smaller molecules

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.