Question

sunlight
sunlight looks white but is actually a mixture of all the colors of the rainbow. if sunlight is white, then why does the sky look blue?
when sunlight strikes air particles, the light is scattered in all directions. this is called diffraction. air molecules scatter some colors of light better than others. blue light is scattered the most, and red light is scattered the least. in fact, blue light is scattered at least ten times
what is the main idea of this passage?
air molecules scatter light in all directions.
diffraction causes the sky to look blue.
sunlight has more blue than any other color.
air molecules don’t diffract red light very well.

Explanation:

The passage explains that sunlight is a mixture of colors and focuses on why the sky looks blue. It details how air - molecules scatter light, with blue light being scattered the most due to diffraction.

Answer:

Diffraction causes the sky to look blue.