Answer:
Condensation happens when molecules in a gas cool down as the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules and finally the molecules collect together to form a liquid.
Explanation:
 
        
                    
             
        
        
        
An organism reacts to changes in its environment. this is called Behavior
        
             
        
        
        
Answer: c. It is the first hominin known to have migrated out of Africa.
Explanation:
The Homo erectus were the ancient humans which are considered to be over first relatives which used to have human like body shape, short arms and long legs relative to their torso. The main unique feature about these humans is that these were the first humans which migrate out of the Africa and they were the first humans who starting cooking of food for the first time. 
 
        
             
        
        
        
When our red-sensitive nerves in our eyes cannot respond to light properly this will result in color blindness - b. 
When either of the three light-sensitive nerves in our nerve tracts; either green, red or blue, we become to color blind for a certain spectrum of light from nature. 
        
             
        
        
        
Wind-driven waves are created by friction between wind and surface water. When wind blows across the surface of an ocean the continual disturbance creates a wave crest. These waves can be created through local winds or distant winds. The waves can be affected by wind speed and wind duration. The faster the wind and the longer it blows, the bigger the waves. It also can depend on how far the wind blows uninterrupted. 
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