Three fundamental phases:
- Primary
- Secondary succession
- Climax state
Hope this helps :)
 
        
             
        
        
        
Sunlight, water, carbon dioxide, and chlorophyll  :)
        
             
        
        
        
General Westmoreland was the chief commanding officer during the Vietnam War. After his tenure Creighton Abrams took over. 
        
                    
             
        
        
        
The answer is A
Because that would be the correct angle at the degree point which is pointing toward the top right