Yes, whales are mammals. As are dolphins and humans.
Yes, as remember, all creatures neeed air-oxygen, to survive.
Whales need to breathe air because they are mammals, like humans, and require oxygen to survive. Even though they live in water, they have lungs and need to come to the surface to breathe.
Well of course. Everything does
Whales come to the surface to breathe air through their blowholes, as they are mammals and need to breathe oxygen to survive. They also come to the surface to regulate their body temperature and communicate with other whales through vocalizations.
Whales breathe with lungs. Breathing helps them survive.
Whales Breathe air, with lungs. They have to Surface to Breathe, and hold their breath while diving
Whales breathe with lungs, and fish use gills.
Whales breath air using their lungs.
They both breathe air...
Blue whales are mammals. They breathe air with lungs, pretty much just like you and I. When they dive, they hold their breath.
Humpback whales breathe air by using their lungs. They can only breathe in when their blowhole is above the surface of the water. When they exhale, you can see a spout of warm moist air shoot upwards from their blowhole.
Snails cannot breathe underwater. They need air to survive as they have lungs or gills to take in oxygen from the air.