What basis is used to assess suffering across species in comparative welfare assessments?

• A. Evolutionary, anatomical, and functional similarities
• B. Dietary preferences
• C. Color vision similarities only
• D. Habitat similarity

Answer: (A)

The main concept being tested is how we judge suffering across species by looking for shared biological foundations of pain. This uses evolutionary, anatomical, and functional similarities because they reflect conserved mechanisms for sensing and processing harm. If different species share similar neural circuits and brain processes that detect noxious stimuli and generate distress, it’s reasonable to infer they have the capacity to experience pain and thus have welfare implications when harmed. This approach leverages conserved neurobiology and comparative anatomy to inform welfare concerns across species, rather than relying on traits like dietary preferences, color vision alone, or habitat similarity, which do not directly indicate an animal’s capacity to suffer.