The animals and plants in one habitat are suited to live there and may not be able to survive in other habitats.
A woodland owl, for example, would not survive in a desert habitat because:
There is little water available in the desert.
The temperatures would be much warmer than a woodland owl would be used to.
When a habitat changes, the animals and plants that live there are affected. For example, when pond weed is removed from a pond, the fish and snails that rely on the weed for food may find it hard to survive.