Ancient Greece and in Ancient Rome
        
             
        
        
        
Answer: The chameleon is able to change its color to blend with the surrounding environment. 
Explanation:
The chameleon is able to utilize the camouflage adaptation to remain hidden against the predators and can also catch the prey. They are able to change their color from brown to green on grass and vice versa for tree trunk so that on blending with the color of the external environment chameleons remain undetected this is a kind of phenotypic advantage over other reptiles that help them to remain undetected by predators like birds, snakes, and others and help in their survival. This is a kind of natural selection. 
 
        
             
        
        
        
Answer:
labor-force participation rate = 57 %
             Unemployment rate  = 5.1 %
Explanation:
Given :
Adult population = 62.2 million
Employed population = 33.7 million
Unemployed population = 1.8 million
Therefore labor force can be calculated by =  ( Employed population + Unemployed population )
                                                                        = 33.7 + 1.8 
                                                                        = 35.5 million
Thus  labor-force participation rate = ( Labor Force / Adult Population ) x 100
                                                           = ( 35.5 / 62.2 ) x 100
                                                           = 57.07
                                                           ~ 57 percent
Now,
Unemployment rate = ( Unemployed / Labor Force) x 100
                                  = ( 1.8 / 35.5 ) x 100
                                  = ( 1.8 / 35.5 ) x 100
                                  =  5.07
                                  ~ 5.1 
Therefore, labor-force participation rate = 57 %
                   Unemployment rate  = 5.1 %
 
        
             
        
        
        
Knowing about the past keeps the bad things in history from repeating itself
        
             
        
        
        
Not quite sure but I think it is B. 
Hope that helps.