I believe it is temperature or rainfall. All of the factors are improtant but temperature comes first, cuz the temperature can also determine the air, and soil doesn't make a difference. Longitude doesn't have to do with an ecosystem.
        
                    
             
        
        
        
In my opinion mixed layers would be the best choice
        
                    
             
        
        
        
Answer:
Brocolli 
Berries
Soynuts
Celery 
Spinach 
Pears
Explanation:
Six foods that are rich in phytochemicals.
 
        
             
        
        
        
Explanation:
making hypotheses is a scientific method