In a region with a low crude birthrate, a high crude death rate is most likely indicative of <em>a</em><em> </em><em>lack</em><em> </em><em>of</em><em> </em><em>food</em><em> </em><em>and</em><em> </em><em>water</em><em>.</em><em> </em>This is because without food and water, people can die, thus causing a high crude death rate. Food and water is necessary for survival.
The area between the Tropic of Cancer and the Tropic of Capricorn is often called the Tropics. (ever heard of the tropical rainforests this is where they would be found.)