Answer: It is A
Explanation: C and D are jokes/ complete lies. B is wrong because Darwin did observe that animals and plants adapted (evolved) to suit their environments.
 
        
             
        
        
        
Explanation:
I think d hope you get it right I don't remember
 
        
             
        
        
        
The subscript; the number at the bottom right of the symbol
        
             
        
        
        
Answer:
an average of 3 weeks (19-21 days)
Explanation:
 
        
             
        
        
        
Obama?????? i realy dont now