B 
Transpiration is ultimately the main driver of water movement in xylem. The cohesion-tension model works like this: Transpiration (evaporation) occurs because stomata are open to allow gas exchange for photosynthesis.
        
             
        
        
        
Salinity refers to an increase in the dissolved salt content of a body of water. Salinity has great impacts on the type of organisms that live inside the water. In the question given above, the salinity occurs as a result of non natural influence; since most of the organisms living inside the water before probably have specific optimal salinity range, if the salinity exceed the range they can cope with, they will probably migrate away from the water, those that refuse to migrate will probably die out and new species which can cope with the salinity level will emerge.
        
             
        
        
        
Answer:
A substance that is more dense per volume has more mass per volume. ... 
Explanation:
Thus, sound will travel at a slower rate in the more dense object if they have the same elastic properties.
 
        
             
        
        
        
The answer is all of the above