Because they cant breath underwater so they use their hole to breath in and out the water
Blow hole
Through a blow hole, just like all other dolphins
Niether
Dolphins have blow holes, not blow horns. The blow hole allows the dolphin to inhale and exhale air. The blow hole is analogous to a nostril in other mammals.
well they push and push then it comes out of their hole
Dolphins breathe through the 'blow hole' in the top of their heads, surfacing from underwater to blow out the Carbon Dioxide and draw in oxygen.
Because dolphins has a blow-hole to sprout water and breathe like a whale while a whale is bigger in size and it can't do tricks like dolphin
They use a blow hole to breathe in/out air when the surface the water.
For allowing the dolphin to inhale and exhale gases so it can survive.
They use their blow hole that causes conditional power that shoots them out of the water!!
The blow hole is a muscular sphincter; like the human lips, it has the power to close by itself, with nothing covering it.
dolphins breath throuth there blow hole and they also breath throught their mouth when they come up from water hope i answered youre question