Between the 6th and 21st days of the menstrual cycle
        
             
        
        
        
-it transports nutrients in the body 
-it circulates macrophage in the body 
        
             
        
        
        
Answer:
B.  Sea stars are the prey of seagulls
Explanation:
Seagulls eat sea stars, meaning that sea stars are their prey (the organism that is eaten).
Predator: an organism that eats (preys on) another organism
Prey: an organism that is eaten by another organism (creatures can be both predator and prey.  For example, a rabbit is a predator to grass, while they are prey to foxes)
Host: An organism that is fed on by a parasite.  Think of a dog with a tick.  The dog is the host, the tick is the parasite.  
Incorrect answers (and why):
A.  Sea stars do not eat seagulls
C.  If a sea star was a predator to a seagull, that would mean that they eat seagulls.  They do not.
D.  A host is an organism that a parasite preys on.  Not only are sea stars not parasites, but they definitely do not prey on seagulls.  
I hope this helps! :)
 
        
             
        
        
        
Yes it is a carbohydrate found in plants