Answer:
C. Maximum power point tracking.
Explanation:
A. Direct current: It is also called DC in which  electric current flows consistently in one direction.It is used in batteries and cells.It is not used in solar system .Therefore, it is false.
B. Alternating current : It is also called AC . The AC is used in domestic electricity.The current in which direction of electron is reversed after at regular intervals .It is not used for solar cells.Hence, it is false.
C. Maximum power point tracking:It is also called power point tracking. It is used in   charge control in solar cells.it is a technique which is used to extracting maximum available power from PV  ( photovoltaic cells) solar system.It is a technique that is used to adjust load connected to solar cells and increase their energy output.Therefore, it is true.
D. Electromagnetic induction:It is a process for producing EMF due to change in magnetic field. It is not used in solar system. Therefore, it is false. 
Answer:C. Maximum power point tracking.
 
        
                    
             
        
        
        
<span>Yes, it is possible to change on biome to another!</span>
        
             
        
        
        
Less concentrated as, by osmosis, the water moves up the concentration gradient into area of most concentration.
        
             
        
        
        
Answer: True. 
Hope this helps! ^^
        
             
        
        
        
The answer is B. 
Animals do cellular respiration which requires the intake of oxygen and the output of carbon dioxide. In order for plants to do photosynthesis, they need carbon dioxide to be able to make oxygen for animals to breathe.