Ants communicate with chemicals called pheromones.
Pheromones are stinky chemicals excreted from glands throughout the ants body.
Ants communicate via chemicals excreted by their bodies.
Ants communicate via

A: mechanical waves
B: telepathy
C: radio waves
D: radiative transfer
E: electrically
F: excreted chemicals
G: sensory neurons
H: during the day