Answer:
I only know a few 
1. aluminum
5.copper
4.zinc
2.sulphur ( specifically vulcanization of sulphur )
 
        
             
        
        
        
Answer:
What impact does a decrease in pH have on urchins?
Decrease in pH simply means high degree of acidity which affects every living organism. The impact of high acidity affects there food intake, development of their young ones (juvenile)
Explanation:
 
        
             
        
        
        
Answer:
Please i feel bad for you
I think thats an ovary... ???
 
        
             
        
        
        
Answet is D 
species come under at a very low level of the classifieds
        
             
        
        
        
I think I’ll go with C. long dry cold winters