Answer:
If no force acted on a gas at all, it would just escape or spread out forever. Gravity pulls gas molecules in towards the Earth's surface, pulling stronger closer to sea level. This means that atmospheric gases are denser at sea level, where the gravitational pull is greater.
I hope this helped, have a great day!
 
        
             
        
        
        
The best answer to the question above would be the second sentence. The phrase 'Our mission continues' supports the central idea of the speech which is that America's ongoing fight with the terrorists Al-Qaeda will be one that the country will not easily abandon. Other choices are not the main points.
        
                    
             
        
        
        
Answer: C
Explanation: The question asks “What are red tides?” If you look at the 1st answer it gives you a description of what it does and how it negatively impacts the world, the 2nd tells you when it’s formed, the 3rd one explains how it’s formed and what it is and the 4th tell you in what place it’s likely to form 
 
        
             
        
        
        
There black in african paintings