What is the feedback loop? i do not have any choices 
        
             
        
        
        
Answer:
<u>Structure G</u>  is Option (c) : Vacuole 
 
        
                    
             
        
        
        
They are made of some of the same matter
        
             
        
        
        
Explanation:
The enhanced greenhouse effect, sometimes referred to as climate change or global warming, is the impact on the climate from the additional heat retained due to the increased amounts of carbon dioxide and other greenhouse gases that humans have released into the earths atmosphere since the industrial revolution.