An ecosystem is an area where we can find rocks and soil, plants and animals
The savanna is a grassland ecosystem The largest Savannah is in Africa. ( do you remember the lion king?)
Another type of ecosystem is the coral reef. Often called "RAIN FOREST OF THE SEA"... Coral reefs are fragile ecosystems, partly because they are very sensitive to water temperature.
And finally the desert. The largest hot desert on the globe is the Sahara The desert is a region that receives almost no precipitation Isabell