Melanin protects us from:
UV rays
The correct option is option C.
Explanation of the correct option:
Explanation of the Incorrect options:
Option A:
Infrared Rays can cause photochemical changes as they can penetrate deep into human tissue so melanin cannot protect us from them.
Option B:
X-rays are electromagnetic waves that image pictures of the body's inside parts.
Option D:
Visible rays are typically harmless. It helps us to see things. It causes a sensation of sight.
Final answer: Melanin protects us from UV rays.