Downstream river would have less water, so there would be less fish to catch.
River re-routing is a process wherein the mouth of the river is mouth to another location. Thus, existing mouth of the river will lose its water source and have less water. Fishes in the existing river path will decrease because of the decreased level of water. 
        
                    
             
        
        
        
Because in winter 1 habitat might get too cold so the bird might have to move to a warmer habitat in winter
        
             
        
        
        
It’s E,two independent linear equations,each having at least one of the variables
        
             
        
        
        
Answer:
The kidneys take of up more Ca2+ and release vitamin D. The bones release Ca2+. The intestines increase reabsorption of Ca2+.
 
        
             
        
        
        
Answer:
True
Explanation: hope this helps!