Answer: nucleus
Explanation: The nucleus contains the DNA which is a genetic material that contains all the instructions for protein synthesis. Before proteins are produced, the DNA is first of all copied into an single stranded RNA in a process known as transcription. This process takes place in the nucleus. The single stranded RNA then leaves the nucleus to the ribosome where protein synthesis takes place, there the RNA is translated into a polypeptide chain. 
 
        
             
        
        
        
 Sycamore trees (Platanus occidentalis) make handsome shade trees for large landscapes. 

 
        
                    
             
        
        
        
Answer:
A is the correct answer.
Explanation:
Because Adaption means to the process by which a species becomes fitted to its environment. So A is the closest.