Answer: continental glacier
Explanation:
These glaciers are very big and they can cover large amounts of land. These can also cover very large islands. Continental glaciers are the answer.
 
        
                    
             
        
        
        
1 reason is to kill disease in water
        
             
        
        
        
Ans: Cells are so small because it allows them to have a better surface area to volume ratio. This makes it much easier for the cell to bring in necessary nutreints and excrete wastes. Also the smaller the cell is, the less time it takes to replicate the small cell as opposed to a bigger cell.
        
             
        
        
        
Based on the options given, the most likely answer to this query is 
A. Some animals exhibit similar stages in embryonic development. Embryonic development is where a fertilized egg undergoes similar development with other animals.
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Example of multi cropping is tomatoes+onions+marigold