I believe studying the hydrosphere would be most important because we haven't explored a good majority of it yet so we need to explore our waters before we explore space
        
                    
             
        
        
        
Answer:
Solute
Explanation:
Solute - The solute is the substance that is being dissolved by another substance. In the example above, the salt is the solute. 
 
        
                    
             
        
        
        
Answer:
Some important rules of light are:
- the incident ray,normal ray and the reflected ray lie in the same point.
- angle of incidence is equal to angle of reflection<u>.</u>
<u>.The Angle When It Leaves Is Larger Than The Angle When It Hits. The Angle Is Smaller In The Medium That Has The Higher Index Of Refraction.</u>