The correct option is D Animal husbandry is a practice of merely breeding livestock.
∙ Animal husbandry is not only the practice of breeding livestock but it is the science of rearing (also includes farm management) and breeding (selection of high yield breeds) of animals.
∙ Lack of scientific knowledge decreases livestock production and fails to produce disease-resistant varieties of livestock. As a result, diseases can wipe out entire population of livestock in a given area, making it a prime factor that adversely affects livestock and livestock products.