20 points suppose you had two different types of crystals: one with a metallic appearance, and one with a pale pink color. which of the following must be a true statement? a. the crystals must be elements. b. the crystals must be compounds. c. the crystals are made of the same substance. d. the crystals could be elements or compounds.

c) up

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as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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joke:

h o h o hope you have a merry christmas!