Answer:nuclear reactor, solar panel 
Explanation:there are several papers about going to moon and making a working habitat system a moon base, but we need power and i am confuse with which is best source for generating power for moon mission.
 
        
             
        
        
        
Answer:
two hydrogen atom
Explanation:
Sulfuric Acid, H2SO4 is a chemical compound made up of two hydrogen atom, one sulfer atom, and four oxygen atoms.
 
        
             
        
        
        
Do you mean "why"? 
They are the main source for all living organisms because they provide energy, relatively short term, for any creature that consumes them.