Answer:
heart blood vessels and blood 
 
        
                    
             
        
        
        
Answer:
1. c
2. d
3. a
4.b
Explanation:
I numbered the first four boxes a, b, c, and d, and the slots where they go in 1, 2, 3, and 4 going down.
 
        
             
        
        
        
Answer:
5.5|1/4 
Explanation:
.... ..... ........ .........
 
        
             
        
        
        
Answer:
it can result in fish kills and restrictions on human consumption it can change the physiology of fish it can cause long-term alterations of aquatic ecosystems
Explanation: