Uh i kinda need this answered now

which of the following may you do to a vector without changing it?

rotate the vector through any angle other than 360°.
move the vector without changing its orientation.
multiply the vector by a scalar other than 1.
add a nonzero vector to the vector.

the independent variable, or the one that is intentionally manipulated is the speed.

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!