<span>A. abiotic component</span>
An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system.   
        
                    
             
        
        
        
Answer:
Explanation:
They both produce new cells
Explanation:
Mitosis and meiosis both represent cell division that occur in humans and other animals. These cell division processes share many aspects, including the production of new cells and replication of genetic material.
 
        
                    
             
        
        
        
Answer:
D. as an arrangement of four chemical bases
Explanation:
Our DNA is made up of 4 chemical bases (adenine, thymine, guanine, cytosine).
 
        
                    
             
        
        
        
Because humans are humans
        
             
        
        
        
Wrong carbon dioxide goes into the plants leaves and comes out as fresh air