Trees are living things. Dogs, cats, fish, snakes, bees and people are also living things.
Dry leaves on the ground are dead, but they were once part of a living tree. Bones were once part of a living animal that now is dead.
Anything metal, plastic or stone has never been alive.
Fish have to live underwater as they can't breath on land.
Polar bears have white fur so they live in places where there is lots of snow.
Lily pads need water to grow so they live on water like ponds.
Some animals live in micro(small) habitats. These habitats include under a rock, on a pond, in individual tress etc.
Herbivores eat plants
Omnivores eat plants and meat.