Answer:
spider with second option (spiders have an open circulatory system.)
earthworm with first option 
starfish with forth option 
Explanation:
 
        
             
        
        
        
Answer: C
Explanation: All of them could be correct, but I think this is the correct answer. I’m only in middle school, so if your not rushing you may as well wait for someone else.
  
        
                    
             
        
        
        
Answer:
Documentation,link section ,definition section ,main function ,etc
 
        
             
        
        
        
Answer:
May not 
Explanation:
Adaptation is made possible as a result of an organism being exposed to different environmental conditions. These exposure makes it adopt different techniques for its survival which eventually results in it being adapted to the condition and is then passed on as traits to its offsprings. They are then able to survive when met with such environmental condition.
When an organism is exposed to the same conditions all the time then there is lack of genetic variation and adaptation may not occur.