The complexity of the environment. Learning about organisms and the interaction they have with their environment is a how a scientific discipline is defined called Ecology. Ecology is an increasingly interesting field of study. Yet, it is also very sophisticated especially when it comes to studying organisms in the field where there are countless impossible-t- control variables. Therefore, Ecologists use models which are verbal, mathematical, or visual representations that are difficult to visualize complicated things such as what would happen to a group of animals if a resource is restricted. There are six levels of organization within the environment starting with the organism itself. Population is the second level or organization, it is defined as the individual organisms of the same species that occupy the same Geographic location at the same time. A biological community: groups of organisms of different species that are occupying the same geographic location at the same time is considered the third level organization. The fourth level of organization is an Ecosystem which is a biological community and all the abiotic factors ( non-living factors such as temperature, water temperature, water salinity, the chemistry of the soil, available nutrients, the minerals in rocks and many more) affecting it. A biome is the fourth level of organization and is defined as ecosystems that share the same climate and similar biological communities. The last level of organization is called a biosphere, which is any portion on planet Earth that supports life. A habitat is referred to as the area an organism lives in. I.e. the area a tree lives and thrives. In Biology, the term Niche is defined as the role or position of an organism in an environment. That is, how an organism meets its daily energy requirements, reproduces, secures its place, and many more.