habitat

The area or natural environment in which an organism or population normally lives. A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food and the presence of predators. A habitat is not necessarily a geographic area, for a parasitic organism it is the body of its host or even a cell within the host's body.

Citation: 
habitat. (n.d.) The American Heritage® Science Dictionary. (2005). Retrieved October 31 2014 from http://www.thefreedictionary.com/habitat
English

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