Answer:
  i would assume that it would be (a) 
Explanation:
The Sun generates its energy by nuclear fusion 
NUCLEAR FISSION is when the heavy atom is split 
fusion energy is scientifically feasible. Plasma conditions that are very close to those required in a fusion reactor are now routinely reached in experiments
mass gets lost is nuclear fusion
so (a) is the most accurate 
 
        
                    
             
        
        
        
This is called drawing conclusions as once they are done w research, they can comprehend the subject in order to predict what may happen under the circumstances.
        
             
        
        
        
A. Radiation 
Air in a car is heated up with the radiator and then blown out with an air pump.
        
             
        
        
        
Can’t understand question. I don’t know Spanish