Answer:
I think it is pulling the sled off the ice covered back yard. 
 
        
             
        
        
        
Basically its just an air like fluid with chemicals.... just like air it just goes as it pleases and fills space
        
                    
             
        
        
        
Answer: gravity, circuits 
Explanation:
 
        
             
        
        
        
Answer:
Because the uncontrolled and unreasonable use of energy resources in the past few decades has led to the depletion of conventional type of resources. Although, measures are taken at the government levels to control the energy consumption, these attempts only meet with little success. Public awareness is the only way to successfully deal with this problem.
Explanation: