Why are some ants' jaws so fast?

Answer: Spring-loaded mandibles release

Spring-loaded mandibles release ✓ — Correct! Trap-jaw ants have spring-loaded mandibles that snap shut at 145 mph (230 km/h)—the fastest animal-powered movement on Earth! They lock jaws open using muscles, storing energy like a compressed spring. When triggered, jaws slam shut in 0.13 milliseconds! They use this to stun prey and even launch themselves away from danger!

Hydraulic pressure system — Wrong. Insects don't use hydraulic systems in mandibles. The speed comes from mechanical spring energy stored in muscles and released explosively.

Lightweight hollow jaw structure — Wrong. Lightweight jaws help, but speed comes from the spring-loading mechanism. Muscles slowly cock the jaws open, then release triggers instant closure.