Habitat- A habitat is where an specific animal lives. The animals habitat has to be either warm cold or mild weather for the animal to be able to live. In this picture a bird nest is shown. A birds habitat has to be high above a ground so that they are able to fly and not be eaten by their predators.

Biosphere- The biosphere is mostly all of the Earth from water, to grass and also the sky. In these pictures the biosphere is shown in the sky and lighting together. In the other picture 

Population- a population is a group of animals such as a herd. In this picture