They don't really.
They hunt for food in water, but that's about it.
It takes plenty more characteristics to make an amphibian.
Penguins are not amphibians; nor have they ever been amphibians. Penguins are birds which happen to feed underwater.
Penguins are birds; they lay eggs.
Because the group of animals called amphibians do some things that penguins can't. Amphibians can breathe through the skin, which penguins can't. Penguins can - and need to - maintain body heat, while amphibians will happily take on the ambient temperature.
Neither. Turtles are (aquatic) reptiles and penguins are (aquatic) flightless birds.
Because penguins are a type of bird, even though they can't fly.
their characteristics
Neither. A penguin is a flightless bird and a shark is a (cartilagenous) fish.
yes penguins are amphibians we know this because they can stay in water and land too
penguins are types of flightless birds they are not amphibians. amphibians have gills and breathing spaces in their skin. the penguin does not have gills but holds its breath while swimming
because they have bird characteristics
This could the the artic, penguins are migratory and there are no reptile or amphibians there.
amphibians have skin that are slimey and can live in and and out of water