Hi
1. Lithosphere 
2. Hydrosphere 
3.atmosphere
4. Biosphere 
The lithosphere/geosphere is made of the earth's core, the mantle, crust, ocean floor,mountains, sand, etc.The hydrosphere is made of everything water such as oceans, rivers, lakes, rain, and snow.The atmosphere is made of gasses such as oxygen, and hydrogen.Finally the biosphere is all that has life such as plants, animals, people, insects, etc.
        
             
        
        
        
Produce nutrients and food, to convert light energy to chemical energy through the process call photosynthesis. 
        
                    
             
        
        
        
Why people shouldn't be sent to Mars?