Pheromones are example of ----------

Options :
  1. hormones
  2. chemical signals
  3. visual singnals
  4. instinctive behavior


Answer and Explanation :-

Answer: Option 2

Explanation:

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To regret one's own experiences is to arrest one's own development. To deny one's own experiences is to put a lie into the lips of one's own life. It is no less than a denial of the soul.
-Oscar Wilde De Profundis