John likes hiking he observes that whenever he hikes up a hill he breathe heavier than when he is on flat ground which two statements explain why this happened

Sensors in the brain detect a lack of oxygen.

The muscles in his body need more energy and therefore more oxygen

the answer to you question is   jet streams

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.