During it’s main sequence lifetime, a star is kept from collapsing by: A: The strong nuclear force
B: heat that produces gas pressure
C: The fact that stars are made up of very light weight hydrogen gas
D: The week nuclear force

i don't know that i agree with that but what's the question ?

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

hope this ! this is not copied! search it up, it's free of plagiarism!

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