Q: Exposure to what can increase the amount of pigment in the skin and make it appear darker?


Read this paragraph and choose the correct option from the provided answers:

Genes are a major determinant of human skin color. However, exposure to ultraviolet radiation can increase the amount of pigment in the skin and make it appear darker.

 Choices:

- gamma rays

- sunlight

- nuclear radiation

- ultraviolet radiation


A:
ultraviolet radiation