Answer:
B. Mitigating problems associated with rising sea
Explanation:
 
        
                    
             
        
        
        
There are 2 of them :-
1) Phagocytes
2) Macrophages.
These WBCs attach themselves to disease causing pathogens & then engulf them resulting in the destruction of the pathogens. 
_________
Hope it helps!
꧁✿ ᴿᴬᴵᴺᴮᴼᵂˢᴬᴸᵀ2222 ✬꧂
 
        
             
        
        
        
Answer:
The correct answer is - roundworms.
Explanation:
The answer is already mention in the question, however, the detailed answer is as follows:
The characteristics that are given in the question are true tissues, bilateral symmetry, and a pseudocoelom. Worms or helminths are known as primitive form of organization of the Bilaterians. All three group of worms or helmints have a basic bilateral symmetry. 
These organisms inaugurated various characteristic that are found and carried by other animals such as  true tissues, bilateral symmetry, and a pseudocoelom.
Thus, the correct answer is - roundworms.
 
        
             
        
        
        
Adenosine triphosphate (ATP) is a complex molecule which provides energy to the cells. This molecule is present in all the living organisms. The chemical energy which is obtained by the body by the breakdown of the food is captured by the ATP (Adenosine Triphosphate) molecules. This captured chemical energy is then transferred by it in order to fuel different body processes. 
Hence, the answer is ATP (Adenosine Triphosphate).
 
        
             
        
        
        
I think its B, by showing the people how species can become invasive