Animals that live in the Tundra tend to either make their habitats underground, or in caves. They need shelter from the very cold temperatures that are there.
Animals need thick coats to survive in the cold temperatures and often have a protective coloring to hide from predators.
Generally no. Animals need time to adjust to new environments, it can take generations and even then they adjust better to slow changes. They would also need food that they are accustomed to eating in order to survive well.
Water habitats
the plants in the tundra are great food producers for the animals.
Most animals need food or nutrition to survive .
They need their abilities, their shelters, their habitats, and their food sources.
The ocean animals need oxygen to survive.
All animals need water to survive.
All animals need food to survive.
They all do ... but you may be thinking of plants - they don't need animals to survive but animals need plants.
They basically do what humans do to survive. Like humans need to eat to survive and we also need to sleep to survive.
Anaerobic animals (and other substances) survive without oxygen.