An ecosistem is all the living things example.house,rivers,jungles etc.
in an ecosistem ,each organise has
its oun rules and also the house of many
animals tht live there.
miércoles, 15 de junio de 2016
Water Pollution What is water polution Water pollution is the contaminationo by humas to the animal that livein the water and drink water of lakes oceans rivers
