Surprisingly, there are 196 countries today! hope this helped
The type of sand dune that would most likely form if the sand supply is limited the wind direction is constant and vegetation is sparse would be a barchan dunes. It is a <span>crescent-shaped sand </span>dune<span> produced by the action of wind predominately from one direction.</span>
Of these choices i'd say that the third option or "domestic fuels are always cheaper to acquire and renewable". I hope this helps :)
