Concept:Colostrum, the first milk a mother produces, is rich in antibodies that give a newborn passive immunity against diseases.
Explanation:A young animal is born with an immature immune system that cannot yet fight infections effectively.
Colostrum contains maternal antibodies that are absorbed by the newborn's intestine during the first few hours after birth.
These antibodies provide immediate, temporary protection against many common diseases.
Thus, the practice that directly ensures early disease resistance is giving the young animal access to colostrum.
Other options, such as veterinary visits, maintenance rations, or dipping, support health but do not provide this specific antibody-based protection.
Answer:D. Giving the animal access to colostrums