Answer:
PLEASE MARK AS BRAINLIEST!!
Explanation:
In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. ... The idea of natural selection is that traits that can be passed down allow organisms to adapt to the environment better than other organisms of the same species.
 
        
                    
             
        
        
        
The answer is ' B " 
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Answer:
The function of the appendix is unknown. One theory is that the appendix acts as a storehouse for good bacteria, “rebooting” the digestive system after diarrheal illnesses. Other experts believe the appendix is just a useless remnant from our evolutionary past. 
 
        
             
        
        
        
Answer:the big birds survived
Explanation:
 
        
             
        
        
        
Agree because one interaction can affect many and or impact the ecosystem traumatically