What does environmental enrichment primarily aim to improve in laboratory animals?

• A. Welfare by providing enrichment and opportunities for species-typical behaviors.
• B. Data throughput.
• C. Financial efficiency.
• D. Sterility of housing.

Answer: (A)

Environmental enrichment in lab animals is aimed at improving welfare by giving animals stimuli and opportunities that allow them to express natural, species-typical behaviors. When animals can forage, explore, nest, interact socially (where appropriate), and solve simple problems, they experience reduced boredom and stress, which leads to better overall well-being. This focus on welfare and behavior is the main purpose of enrichment, rather than boosting data collection, cutting costs, or maintaining sterility. While enrichment can influence study outcomes and may have some indirect effects on efficiency or data quality, those are not the primary goal.