The biosphere is anything in the atmosphere and on the crust of earth that can support life. This picture is of my backyard and represents the biosphere because it shows living things, the atmosphere, and the earth's crust.

Biotic is the living organisms in an ecosystem. The picture is of my dirty pool and represents biotic because it has algae growing in it.

 A community is a group of species of organisms in a certain area living together. The picture is of roly polys, and a couple ants living under a brick paver by my house.