Q:
      
      
         
            
Which is a common first indicator of an approaching thunderstorm?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: C) a buildup of dark clouds         
         
Explanation: The first indicator of an approaching thunderstorm is a buildup of dark clouds.
A thunderstorm is a storm with lightning and thunder; it is usually produced by heavy rain, gusty wind, and the cumulonimbus cloud. The thunderstorm is made up of moisture, unstable air and lift. 
       
      
      
      
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