The word "ecosystem" is derived from the Greek terms "oikos" and "sistema". Oikos means habitat. Sistema means a set of interacting components arranged neatly to work together for some purpose. Essentially, an ecosystem is a habitat made up of living and non-living things that work harmoniously together to produce energy and eventually attain sustainability. The arrangement of the ecosystem is like a clock where each part works closely and in harmony with each other such that it is able to tell time.