1. The groovings are formed

1. 1. through stream deposition

   
   
   

   2. through wind deposition

   
   
   

   3. through glacial erosion

   
   
   

   4. through river erosion

   
   
   

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1. View Hint View Answer Discuss in Forum

   through river erosion

   Correct Option: D

   through river erosion

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2. Karst landforms are made by

1. 1. waves in coastal areas

   
   
   

   2. wind in the semi-arid regions

   
   
   

   3. water in limestone regions

   
   
   

   4. glaciers in the coasal regions

   
   
   

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1. View Hint View Answer Discuss in Forum

   water in limestone regions

   Correct Option: C

   water in limestone regions

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3. The colour of Yellow Sea is the result of

1. 1. industrial pollution.

   
   
   

   2. peculiar types of phytoplankton growing there.

   
   
   

   3. loess brought by Hwang-he river.

   
   
   

   4. high sulphur content in the bottom rocks.

   
   
   

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1. View Hint View Answer Discuss in Forum

   loess brought by Hwang-he river.

   Correct Option: C

   loess brought by Hwang-he river.

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