56. Continental shelves have

1. 1. Deep waters

   
   
   

   2. Shallow waters

   
   
   

   3. Deep currents

   
   
   

   4. Ground for fish

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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57. Plankton is used as

1. 1. Food material

   
   
   

   2. Fruit

   
   
   

   3. Banana

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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