Which one of the following birds is often regarded as the “Farmers of the Forest”?
[A]Great Indian Bustard

Hornbills are unique birds. They get their name from the horn-like projection called a casque on top of their beak. Hornbills are often called as the ‘farmers of the forest’ as they disperse the seeds of many tropical trees and keep the forest alive. Unfortunately, most hornbill species are threatened by habitat loss and hunting.