The answer is A. Buffalo.
Buffalo, stag, camel, and rhinoceros are all mammals. However, buffalo are the only one of these animals that is a member of the bovine family. Bovines are a group of mammals that includes cattle, bison, and yaks. Stags are male deer, camels are members of the camel family, and rhinoceroses are members of the rhinoceros family.
Buffalo are large, hoofed mammals that are native to Africa, Asia, and North America. They are herbivores and eat mostly grass. Buffalo are social animals and live in herds. They are an important part of the ecosystem and help to control the population of grasses.
Stags are male deer. They have antlers, which are used for fighting during the mating season. Stags are herbivores and eat mostly leaves, twigs, and buds. They are an important part of the ecosystem and help to control the population of trees and shrubs.
Camels are large, hoofed mammals that are native to Africa, Asia, and Australia. They are herbivores and eat mostly grass, leaves, and twigs. Camels are well-adapted to living in hot, dry climates. They have a thick coat of fur that helps to keep them cool, and they can store water in their humps.
Rhinoceroses are large, hoofed mammals that are native to Africa and Asia. They are herbivores and eat mostly grass, leaves, and twigs. Rhinoceroses are well-protected from predators by their thick skin and horns. They are an important part of the ecosystem and help to control the population of grasses.