Which best describes what is occurring when a door is almost closed and rays of light fan out from the small opening? absorption interference refraction diffraction

The real answer is D

Diffraction

It is defined as the bending of light around the corners of an obstacle or aperture into the region of the shadow of the obstacle. This is refers to various phenomena which occur when a wave encounters an obstacle or silt.

While diffraction occurs whenever propagating waves encounter such changes, its effects are pronounced to waves whose wavelength is comparable to the dimensions of the diffracting object or silt.