You are presented with the question "Ants communicate via" and the following answer choices: 
- mechanical waves
 - telepathy
 - radio waves
 - radiative transfer
 - electrically
 - excreted chemicals
 - sensory neurons
 - during the day

Now knowing that ants communicate with chemicals called pheromones and pheromones are stinky chemicals excreted from glands throughout the ants body, choose the best answer.


 

      excreted chemicals   