<span>respiratory circulatory digestive</span>
        
             
        
        
        
The answer to this question is A
        
             
        
        
        
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. 
 
        
             
        
        
        
Answer:
id say A:  
The model shows that the fetus becomes more complex during development. This is because mitosis allows the cells that make up the fetus to become specialized.
or D:
The model shows that the fetus gets larger as time goes on. This is because mitosis constantly increases the number of cells that make up the fetus.
Explanation: