Your house is part of your habitat because you live there. So is your yard, because you play there. Every different species has its own special habitat, like you have your own special places to live and play. But plants and animals can only live in their own special places. Each different ecosystem is special, because different species call different ecosystems home.
Ecosystems can be very large, or very small, but they are all fragile.
Unfortunately, this happens to too many ecosystems. Often, an important part of the ecosystem, like a special kind of tree, insect, or animal will disappear, or a river will dry up. When that happens, the ecosystem won't work the way it is supposed to. That's where people like you, your parents and teachers can help. You can join groups like The Nature Conservancy, or even start your own group, to help protect ecosystems that are still working.