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.
A catchment is an area of land with a common drainage point. A watershed is a ridge or elevated land separating one catchment from another. A2. A catchment is an area of land with a common drainage point. A watershed is a ridge or elevated land separating one catchment from another.