Grassland are ecosystems that are characterized by grasses and other herbaceous plants. Some of the animals that lives in there are: bison, prairie dogs, coyotes, many species of birds...

Ponds are small still water that are surrounded by land. In the ponds we can see living beings such as: algaes, mosquitos, frogs and toads.

A forest ecosystem is a large area of land that's covered in trees and other woody plants and filled with living animals such as: deers, wolves, foxes, owls...

A marine ecosystem are located inside of water. We can see animals such as: Sharks, whales, dolphins, seals, walrus, and many more come under this ecosystem.

The city is the place where most of human beings live. They organize in different neighborhoods, buildings, streets ...