Which of the following factors affects feed requirements?

• A. Habitats
• B. Color of feathers
• C. Age, size, purpose
• D. Favorite food

Answer: (C)

Feed requirements come from what the animal needs to grow, maintain itself, or produce something (like milk or offspring). Age, size, and purpose capture those factors most directly: age tells you whether the animal is in rapid growth, mature maintenance, or reproductive stages, which change how much energy and protein are required; size affects the total maintenance energy and how much feed the animal can reasonably consume; and the production goal (meat, milk, work, breeding) determines the nutrient balance and minerals needed to support that specific function.

Habitat can influence what feed is available or how it’s managed, but it doesn’t change the animal’s fundamental nutrient requirements. Color of feathers is cosmetic and doesn’t affect dietary needs. Favorite foods reflect palatability rather than overall dietary needs.