Why do fireflies glow in the dark?

Answer: To attract mates

To attract mates ✓ — Correct! Fireflies produce light through bioluminescence—a chemical reaction between luciferin and oxygen, catalyzed by luciferase enzyme. Males flash specific patterns to attract females. Each species has unique flash codes—like Morse code for love! Nearly 100% efficient (no heat waste).

To digest food better — Wrong. Bioluminescence isn't related to digestion. It's produced in special organs for communication, especially mating signals.

To warm their bodies — Wrong. The light produces almost no heat (cold light). Fireflies are cold-blooded and don't need to warm themselves with light.