Death due to disease is called death by natural causes. There are four main types of disease: pathogenic disease, deficiency disease, hereditary disease, and physiological disease. Diseases can also be classified as communicable and non-communicable disease.
A watershed is the area of land where all of the water that falls in it and drains off of it goes to a common outlet.
Most of the Great Basin watershed is located in the state of Nevada, but includes parts of the neighboring states of California, Oregon, Idaho, and Utah. + 69 others found this useful.