An oil-spill is the massive release of liquid petroleum hydrocarbon into the environment. It usually occurs in the sea. It is due to human activity and causes pollution. The environment is highly affected on this situation. Large-scale oil-spill affects the environment in various ways such as death of several sea creatures such as fishes. It could also lead to contamination of our seafood. and it also cause a long-term damage to the food chain. 
        
             
        
        
        
The correct answer is A. maintaining homeostasis. 
Homeostasis is a term referring to an organisms continuous process of maintaining and auto-regulating the conditions of its internal environment. Variables such as pH, temperature, and fluid balance need to be at optimal conditions in order for the organism to function properly.
In this example, the phosphate buffer system permits the organisms to maintain a constant pH in their intracellular fluid. This is one of the organism's homeostatic mechanisms.      
        
             
        
        
        
O+       1 in 3        <span>37.4%
</span>O-        1 in 15        <span>6.6%
</span>
O- can receive O-
O+ can receive O+, O-
O  can receive<span> O, A, B, AB</span>
 
        
        
        
<span>Almost. Due to the fact that they will be different at the DNA level.</span>
        
             
        
        
        
Answer:
Theophrastus is known as the 'father of botany'.
Explanation: