The document describes a mutualistic relationship between monkeys and deer in India. During the dry season, messy-eating monkeys eat fruit in trees and drop some on the ground below. The deer rely on this fallen fruit for food when grass is scarce. In return, the deer act as an alarm system for the monkeys by using their good eyesight, hearing, and sense of smell to detect predators and warn the monkeys. This relationship benefits both species through food sharing and protection.