Answer:
The climate
Explanation:
The climate is different on each planet in this solar system because of the factors:
rotating speed, revolving speed, how close it is to the sun, and whether it has an atmosphere, and if it has an atmosphere, how dense is the ozone layer.
 
        
                    
             
        
        
        
All of the above.
Water is essential, you can only survive an average of 3 days without it. (some people have survived for longer though.)
Water is important for shipping and trade, because, ships. They go across water. Trade happens. It's hard to fit a lot in airplanes and you have to monitor it's weight slowly. Across land, it's also hard to fit a lot in random trucks driving across what was an ocean. (it would also be much more tedious) It's also one of the cheapest ways.
It is, I guess. There is a high demand for water, and a limited amount as well. It would also be profitable because you can get water easily, or something. (I don't really know for this one but the other two are true so I guess you can't select two so yeah.)
        
                    
             
        
        
        
In this case, the physiotherapist is using Constraint-induced movement therapy. 
In Constraint-induced movement therapy, the therapist forces the use of the affected arm, by restricting the movement of the arm. In this condition, the therapist block all the possible to work with an unaffected arm, which force the person to use the other arm, and hence, it helps in restoring the movement of the affected arm. 
 
        
             
        
        
        
The answer is carbon dioxide. so its true