Answer:
bcuz in which habit they have been addicted they can't change it easely after a long try also so it is hard to get people to change their behavior
 
        
                    
             
        
        
        
Answer:
A. It allows two populations to evolve separately.
Explanation:
Geographic isolation is theorized to have catalyzed the formation of new species. Let’s say groups A and B of a bird species get separated by something, and they can’t cross between to interbreed or exchange alleles.
We describe this as no gene flow, which is the opposite of choices C and D. Because of this, they may diverge if given enough time due to the difference in environmental pressures, because they’re now in different environments.
B is incorrect because it doesn’t apply.
 
        
                    
             
        
        
        
It makes a longitudinal wave because it stretches and compresses while it slithers forward
        
             
        
        
        
Gasse you cant see and liquid you can see or toch and feel them
hope that helps
        
             
        
        
        
Explanation:
Igneous rock is formed through the cooling and solidification of magma or lava.