Nuclear reaction fission powers the both of them
        
             
        
        
        
A. Shellfish will disappear first if an estuary was destroyed.
 
        
             
        
        
        
Answer:
A is the answer. Population growth is decreasing.
Explanation: 
The formula is (birth rate + immigration) - (death rate + emigration). So, 4+10=14, 2+3+8+3= 16, 14-16 = -2. -2 is a negative number, meaning population is decreasing. Hope this helped!