Which of these best describe a desert?
Usually less than 250mm of rain per year, vegetation is less than 50%
At least 300mm of rain per year, vegetation is less than 50%
Usually less than 150mm of rain each year, no vegetation
Less than 50mm of rain per year, vegetation is less than 50%
(A) Usually less than 250mm of rain per year, vegetation is less than 50%
Explanation: