Final answer:
Tibetan highlanders' ability to survive at high altitudes with low oxygen levels compared to lowlanders is an example of adaptation to high altitudes.
Step-by-step explanation:
The ability of Tibetan highlanders to survive at high altitudes with low oxygen levels compared to lowlanders is an example of adaptation to high altitudes. Highlanders have developed unique physiological adaptations, such as increased breathing rate and higher hemoglobin concentration, which help them cope with the low oxygen environment. These adaptations allow them to thrive in their high-altitude habitat.