Fact 1: Ants communicate with chemicals called pheromones.

Fact 2: Ants use receptors on their antennae to follow recruitment pheromone trails.

Given the two facts above, answer the question "What do ants use to communicate?" with the following options: 
- nerves
 - heat energy
 - sound
 - binary code
 - light energy
 - Antennae.
 - megaphones
 - hand signals


 

      Antennae.   