There are many but these are the main ones.
-Ideal Diet for the species in question
-Freedom from pain/abuse or disease
-Correct environment
-Proper Social housing. E.g. An animal that spends its life in solitude should be housed in solitude unless you plan to breed and have a licence to do so.
-The ability to exhibit normal behaviour E.g. if your animal naturally climbs provide an environment for it to do so safely.
The five most common requirements are oxygen, water, food, shelter and protection.
food, water, shelter, and air
Most animals need food or nutrition to survive .
Tigers need food to survive like all animals and mammals. Also it needs food for it's young.
The ocean animals need oxygen to survive.
There are just a few basics that animals need to survive. A duck needs access to food, shelter from weather, and access to water. Having access to this, helps a duck survive.
They need to eat, process energy, avoid being eaten, reproduce, adapt, survive... just about identical to plants and other animals.
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.