Fact 1: Animals can communicate with sounds, chemicals, or visual cues.

Fact 2: Pheromones are chemicals produced by animals allowing individuals of a species to communicate.

Given the two facts above, answer the question "What are pheromones used for?" with the following options: 
- Taste
 - photosynthesis
 - spread flower seeds
 - Plant reproduction
 - Sound
 - Plants growth
 - Communication
 - Sleep


 

       Communication  