Provide a species-appropriate example of environmental enrichment for a nonhuman primate and for a rabbit.

• A. For a nonhuman primate: foraging devices and social opportunities; for a rabbit: gnawing materials, tunnels, and hiding spaces.
• B. For a nonhuman primate: isolation; for a rabbit: loud noises and bright light exposure.
• C. For a nonhuman primate: minimal human interaction; for a rabbit: single-cage housing with no enrichment.
• D. For a nonhuman primate: foraging devices only; for a rabbit: social housing only.

Answer: (A)

Enrichment should suit how each species naturally behaves and what keeps them mentally and physically engaged. Nonhuman primates are highly social and rely on active foraging and manipulation of objects; providing foraging devices gives them problem-solving opportunities and rewards, while social opportunities satisfy their need to interact, groom, play, and establish social bonds. For rabbits, enrichment should support their chewing instinct, exploration, and sense of security: gnawing materials help wear down and maintain teeth, tunnels let them burrow and explore, and hiding spaces provide a safe retreat and reduce stress. Together, these elements foster natural behaviors and welfare. The other options introduce stress or fail to meet these behavioral needs: isolation and aversive stimuli like loud noises or bright light can be harmful; minimal human interaction or single-cage housing without enrichment deprives primates of social and cognitive stimulation; for a rabbit, focusing only on social housing omits essential activities like chewing and burrowing.