Answer:
a.  It can be used for photosynthesis.
Explanation:
Since carbon dioxide is needed in the photosynthesis process, then much of the carbon dioxide which is produced by green plants is not always excreted in form of metabolic waste because it can be easily used in the photosynthesis process.
 
        
             
        
        
        
As you age, you realize that the way you eat might effect how long you live. Eating too much or too much bad things can give you lots of medical conditions, and you realize that as you get older.
        
                    
             
        
        
        
Answer:
Doctors Office
Explanation:
It is more cost effective to go to your primary doctor then to the hospital
 
        
             
        
        
        
<span>Establishing smoke-free zones and enforcing alcohol policies on college campuses illustrate a new emphasis on: Health promotion
Smokes has been proven to caused various type of diseases such as lung cancer and Erectile dysfunction, and alcohol has been proven to damage your liver in the long run. Regulating these substances will improve people's overall health within your community.
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