What causes a rainbow?
A. Raindrops act like prisms and separate light into the spectrum.
B. The upper atmosphere acts like a prism and separates light into the spectrum. C. Clouds act like prisms and separate light into the spectrum.

Option A.

Explanation:

Essentially, the cause of a rainbow is the reflection of sunlight through individual drops of water. Light enters the water and reflects from the opposite side of the water drop, bouncing back through the point of entry. Because the angle or refraction of the light changes as it bounces back.

rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. A

Explanation:

chordata is the answer