Why do we have fingerprints?

Answer: Improve grip and touch sensitivity

Improve grip and touch sensitivity ✓ — Correct! Fingerprints serve two main functions. The ridges increase friction, improving grip on objects by channeling away moisture like tire treads. More, they amplify vibrations from textures you touch. The ridges create pressure variations that stimulate mechanoreceptors in the skin, giving you enhanced tactile sensitivity. They form in the womb as dermal papillae create unique patterns.

To regulate temperature — Wrong. Fingerprints don't regulate temperature. They evolved to enhance grip by channeling moisture and improve touch sensitivity by creating dermal ridges that amplify texture vibrations.

To protect finger bones — Wrong. Fingerprints don't protect bones. These dermal ridges enhance grip through increased friction and moisture channeling, plus improve touch sensitivity by amplifying vibrations to mechanoreceptors.