Answer:
The correct answer is: Pheromones.
Step-by-step explanation:
- Pheromones can be defined as certain chemical substances which are small and volatile in nature. They are also water soluble.
- Many of the pheromones are made up of peptides and proteins.
- They are secreted or released into the environment by animals and can get dispersed to long distances.
- They are used by animals for various purposes of communications like:
- To spread a response of alarm to the entire community of animals, in case of any danger.
- To attract members of the opposite sex at the time of ovulation or sexual maturity.
- To demarcate the territory of an animal.
- To inform other members of a social group about the availability of food at a particular location.