Ecology is the study of aboitic and biotic things interacting with each other in the ecosystem. A ecosystem is how animals interact with each other. Ecosystems have symbiotic relationships including Mutualism, Commensulism, Parasitism. Mutualism is when both organisms benefit, for example a Clown fish and Sea Anemone. The clown fish cleans the sea anemone and the the sea anemone gives the clown fish shelter. Commensulism is when one of the organisms  benefit and the other organism is not effected. Parasitism is when one of the organisms benefits and the other organism is harmed, such as a tape worm.  The tape worm gets in a body and is getting fed every time the animal eats, not allowing the animal to get nutrition.

Animal page also check out my food web and food chain page