When exposed to strong sunlight for a long time, our skin darkens. This is due to the skin pigment known as:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Melanin
Melanin is the dark pigment that gives colour to our skin, hair and eyes. Sunlight makes the skin produce more melanin, which absorbs ultraviolet rays and protects the deeper layers; this is why the skin becomes darker (a suntan).
Why the other options are incorrect
Option (1) Chlorophyll — Incorrect. The green pigment of plants that absorbs light for photosynthesis.
Option (2) Carotenoids — Incorrect. Yellow and orange pigments found in plants, as in carrots.
Option (3) Anthocyanin — Incorrect. A red, purple or blue pigment of flowers, fruits and leaves.