The answer is actually none of the above. The Devonian Period allowed for amphibians to evolve, as well as terrestrial vertebrate. Forests grew to cover most of the continent. All of these events happened in the Devonian Period.
 
        
                    
             
        
        
        
Answer:
the garden has a low ph, under 7
Explanation:
took the test 
 
        
             
        
        
        
A delta is formed by constructive erosion.
        
             
        
        
        
Answer:
(a) Muscle B contracts and muscle A relaxes
(b) The Heart
 
        
                    
             
        
        
        
There are many conservation issues, desertification, erosion, ecocide, coral reefs, biodiversity threats and losses defaunation etc.