When an object in translational motion moves in a straight line, it is said to be in rectilinear motion. ... When an object in translational motion moves along a curved path, it is said to be in curvilinear motion. 2. Examples are a car moving on a straight road and a train moving on a straight track.

i think its

the inner core.

good luck: )

klicker

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!