why do animals in the alpine generally have higher levels of hemoglobin?

why do animals in the alpine generally have higher levels of hemoglobin?
Answer
Brief Explanations:
Alpine regions have lower - oxygen levels. Hemoglobin binds and transports oxygen. Higher hemoglobin levels help animals in alpine regions obtain enough oxygen to meet their metabolic needs.
Answer:
To adapt to low - oxygen alpine environments and ensure sufficient oxygen supply for their bodies.