Which term describes records of animal productivity used to compare animals?

• A. Adaptation
• B. Performance data
• C. EPD
• D. Environment

Answer: (B)

Performance data are records of an animal's productivity used to compare animals. These measurements capture actual output across traits—like growth rate, feed efficiency, milk production, or egg yield—and let breeders rank individuals by how well they perform in production settings. Because they reflect real, observed performance, they’re the most direct way to compare animals. In contrast, adaptation describes how well an animal can adjust to its environment; environment refers to the external conditions affecting the animal; EPD estimates genetic merit for offspring and is a prediction used for selecting sires and dams rather than a direct record of current production. Therefore, performance data best fits the description.