The bending of a wave when it moves from one material to another is

Refraction

Explanation:

Refraction is the bending of the path of a light wave as it passes from one material into another material. The refraction occurs at the boundary and is caused by a change in the speed of the light wave upon crossing the boundary. (in other words I googled it hope it helps ╰(*°▽°*)╯)

c is the answer for this

answer; i believe the correct answer is enlightenment;