The whales tail which is called fluke are used for swimming and also used when they stick their tail out of the water into the air, swing it around, and the slap it on the water's surface. 
        
                    
             
        
        
        
Answer:
D
Explanation:
Just trust me.  
it's not A because there's no such thing as favorable traits whenever it comes to incesticide and for B the majority of Beatles and future generations will also die that's only to the ones that died but that can not happen, which means that D is the one that will be the correct answer because if one lives, then the rest of the generations live due to immunity in the generation that started it.  
 
        
                    
             
        
        
        
Multidisciplinarity draws on knowledge from different disciplines but stays within their boundaries. Interdisciplinarity analyzes, synthesizes and harmonizes links between disciplines into a coordinated and coherent whole. 
 
        
             
        
        
        
Answer: Option C."hypernatremia"
Explanation:
Hypernatremia is defined as the a electrolyte problem in which sodium concentration rises to a value more than 145 mmol/L in serum. 
The major symptoms of hypernatremia involves thirst, muscle twitching or spasms, and confusion.
Hypernatremia  is a hyperosmolar condition caused by a decrease in total body water (TBW) against electrolyte content and several causes of hypernatremia includes intake of hypertonic fluid, salt poisoning in children, and inadequate intake of free water associated with total body sodium depletion et cetera.
Hence, the correct option is C.