I know this isn't answering your question but i think you will find it useful to visit the link pasted below. i just visited it and it explains pretty much everything about this.
        
             
        
        
        
The answer is b because that's the only place where the leaf can be water to go through transpiration and the water cycle
        
             
        
        
        
Answer:
The water which is released back to the lake contains thermal energy ie heat energy from cooled engines therefore bringing thermal pollution
 
        
                    
             
        
        
        
Because water makes everything flow to the digestive track
        
             
        
        
        
Answer:
So how big is just one gigatonne? This unit of mass is equivalent to one billion metric tons, 2.2 trillion pounds, or 10,000 fully-loaded U.S. aircraft carriers. Central Park is 4 kilometers long and 0.8 kilometers wide. A gigatonne of ice placed here would extend 341 meters (1,119 feet) high.
Explanation:
hope this helps...