Begin the answer by mentioning the national tree and flower, bird, animal, etc.
Solution:
The natural national symbols are:
National Bird
National flower
National tree
National fruit
National river
National reptile
National aquatic animal
National microbe
Peacock is our national bird. Lotus is our national flower. Banyan is our national tree. Mango is our national fruit. River Ganga is the national river. Snake is our national reptile. Dolphin is our national aquatic animal. Lactobacillus is our national microbe.