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Human bio-cultural adaptation refers to the process through which human beings adjust to their physical, biological, and socio-cultural environments by using a combination of biological evolution and cultural innovations. Unlike other species that rely primarily on biological adaptation, humans possess the unique ability to modify their surroundings through culture, technology, and social organization. Environmental anthropology studies these adaptive processes by examining the dynamic relationship between humans and their environments, emphasizing that survival and development result from the interaction of biological capacities and cultural practices. Biological adaptation involves inherited genetic and physiological changes that enhance survival in specific environments. Over thousands of years, natural selection has produced populations with traits suited to local ecological conditions. For instance, populations living at high altitudes, such as those in the Himalayas and the Andes, exhibit physiological adaptations including greater lung capacity, efficient oxygen utilization, and increased red blood cell production. Similarly, skin pigmentation varies according to ultraviolet radiation levels, with darker _____ _______ ______ _________ ___ ___ ____.
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