Answer : 3. "आम"
Explanation :

1. In the Bhil tribe, the leaves of the mango tree are used to decorate the pavilion on the occasion of marriage.

2. People of the Bhil tribe believe that decorating the pavilion with the leaves of the Bael tree brings happiness, prosperity and prosperity in the life of the married couple.

3. They are used to bring happiness, prosperity and well-being in the life of a married couple.