Let's determine how light travels.
It can be said that light travels in straight lines primarily because there is less diffraction in light.
Diffraction of light occurs when a light wave passes through an open slit that is approximately the size or smaller than the light' wavelength.
Also, as light travels in waves but these waves are called straight lines.
We can also say that straight lines in which light travels are called rays.
Light changes direction when it comes across objects like mirrors, or when it passes from one object to another.
Therefore, the correct answer can be said to be All of the sections.
ANSWER:
All of the sections.