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.
Watersheds are basically the areas that water flow in order to reach the ocean. For instance, a creek is part of the watershed of the St. Joseph River, which is a part of the â¦ Great Lakes Watershed, that is a part of the St. Lawrance Seaway Watershed which filters into the Atlantic.stuaries are places where it is half salt water and half fresh water it is important because salt water has more minerals and fresh water has more oxygen so it is kind of lik â¦ e the best of both worlds for the animals who live there.