Diffraction is the bending of light as it moves from one medium to another because of the change in the speed of light within that medium.

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

answer: option c.

explanation:

their crystal patterns have been disrupted by stress

i would say