The correct answer is: A. Bending of light waves.
Refraction is the bending of light as it passes from one medium to another. This happens because light travels at different speeds in different media. When light enters a new medium, it slows down or speeds up, depending on the density of the medium. This change in speed causes the light to bend.
Reflection is the bouncing of light off a surface. This happens when light hits a surface that is not smooth. The light waves are reflected back in the same direction that they came from.
Diffusion is the spreading of light in all directions. This happens when light hits a surface that is rough or uneven. The light waves are scattered in all directions.
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