Comparative biology is a field of biology that involves studying the similarities and differences between different species or groups of organisms in order to understand their evolutionary relationships, physiological adaptations, and ecological interactions. This field relies on comparing anatomical, physiological, genetic, and behavioral traits across different species to uncover patterns and trends that can provide insight into the evolutionary processes shaping the diversity of life on Earth. Comparative biology can help scientists understand the shared ancestry and adaptive strategies of different species, as well as predict how organisms may respond to environmental changes in the future.