What are the reasons behind the life expectancy in the following countries : saudi arabia,china and brazil?
Well Saudi Arabia, China and Brazil are all LEDC’s (Less economically developed country) If you have a look here; http://www.bbc.co.uk/schools/gcsebitesize/geography/images/g_cod_wid_02.gif This shows something called the Brandt Line, which effectively slices the world in half into the “rich” north and “poor” south. All of these countries are below this line and this will affect their life expectancy in general. To understand why a country has a particular life expectancy you will need to look at such demographics as the quality of life in general (GNP, PPP, infant mortality rates, access to clean water and hygiene and what its economy is based on. Your quetion is fairly unspecific and so I cannot help you any further.
