Answer : 3. "04 October"
Explanation :

Has been dedicated as World Animal Day. It is a global initiative for animal rights whose main objective is to ensure better standards for animal welfare. This day generally not only makes people aware about the endangered species but also teaches them how to save them. World Animal Day is gradually being celebrated all over the world. Which unites and encourages the movement of animal protection. Apart from making some contribution towards animal rescue shelter and animal welfare, people also organize many other events on this day.