A. climate, because temperature and precipitation are directly related to how dry or fertile soil is
        
                    
             
        
        
        
Answer:
oxygen is an element and water is a compound 
Explanation:
oxygen is made up of two atoms and water is made up of two elements
 
        
             
        
        
        
A. Neutral water 
Less than 7 is acidic (which has 6 letters, 6< 7)
More than 7 is alkaline (which has more than 7 letters). Alkaline = basic 
7 is neutral
 
        
                    
             
        
        
        
The white blood cell identifies the toxin produced by the pathogen and creates antibodies to fight the pathogen