Blowhole

Imagine trying to breathe while holding a large umbrella over your head during a rainstorm. Just as the umbrella shields you from getting wet, a whale's blowhole positioned on top of its head allows it to breathe while keeping most of its body submerged in water. The umbrella is like the whale's body beneath the surface, and the small gap you create for air is akin to the blowhole, ensuring you can take in air without being drenched, just as the whale breathes without leaving the water.