How does external nostril helps survival?

The external nostrils play a crucial role in survival by facilitating respiration and enhancing the sense of smell. They allow for the intake of oxygen-rich air, which is vital for cellular functions and energy production. Additionally, having a keen sense of smell helps organisms detect food, predators, and potential mates, aiding in foraging and reproduction. Overall, external nostrils contribute significantly to an organism's ability to adapt and thrive in its environment.