In competition, males use feather color to warn potential rivals that they occupy a piece of territory.
        
             
        
        
        
Because it can cause some very bad cramps in the stomach
        
             
        
        
        
Answer: Winter solstice, also called hibernal solstice, the two moments during the year when the path of the Sun in the sky is farthest south in the Northern Hemisphere (December 21 or 22) and farthest north in the Southern Hemisphere (June 20 or 21). 
Explanation:
 
        
             
        
        
        
Answer; 
 DNA or protein sequences of shared genes
The MOST accurate way to determine the evolutionary relationship between two animals is through the examination of DNA or protein sequences of shared genes. 
Explanation; 
DNA or protein sequences of shared genes. Biochemical evidence is extremely accurate in determining the relationship between two organisms. Many animals have been re-classified, due to DNA evidence. 
 
        
                    
             
        
        
        
Pumping water out of the ground faster than it is replenished over the long-term causes similar problems. The volume of groundwater in storage is decreasing in many areas of the United States in response to pumping. Groundwater depletion is primarily caused by sustained groundwater pumping.