Give one reason why the availability of drinking water is a problem in the developing world

The availability of water is a problem in the developing world because, often, those countries are located in regions where water is scarce as the climate is dry or very hot, so the reservoirs of water are extremely rare and often they are under the control of the power entities, which can make the access to the resource even more difficult.

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!