In the article “Not So Tiny Bubbles,” how is the concept of decompression (loss of pressure) related to the concept of how gasses dissolve in liquids?

1) When a gas decompresses, it dissolves into a liquid form.
2) When a liquid becomes a gas, it also undergoes decompression.
3) Decompression causes the gas in a liquid to expand.
4) when a gas dissolves in a liquid, it causes decompression

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.