Question

which observation supports the idea that light is made of particles?
light is produced by the interaction of magnetic and electric fields.
light spreads out after passing through an opening.
light diffracts when it hits a barrier.
light moves in a straight path.

Explanation:

The particle - like behavior of light is demonstrated by its straight - line motion. Light being produced by electromagnetic field interaction relates to its wave - particle duality but doesn't specifically support the particle nature. Spreading out after passing through an opening and diffraction are wave - like behaviors.

Answer:

Light moves in a straight path.