Echinoderms, like chordates, are deuterostomes and are therefore thought to be the most closely related of the major phyla to the chordates
        
             
        
        
        
I would have to say conspiracy.
        
             
        
        
        
Answer:
Peduncle
Explanation:
The Caudal Peduncle or Peduncle in this case is the muscular region that is found between the dorsal and an.al fins. 
This Peduncle helps the fish to swim and navigate the currents in the water. 
It helps to propel the fish to move quickly through water as it acts like a motor. 
 
        
             
        
        
        
The immediate lack of oxygen. 
        
             
        
        
        
Answer: b) storing the genetic code providing substrate for the citric acid cycle providing electrons to the electron transport chain.