Answer:
B. The population must be very large.
Explanation:
 
        
             
        
        
        
Answer:
Sudden Influx of Nutrients
Explanation:
Algal blooms are caused by a sudden influx of nutrients, coupled with already warm temperatures.  This can happen from fertilizer runoff from farms or chemical industry waste.  They allow algae to quickly grow, but the water reaches carrying capacity.
 
        
             
        
        
        
<span>When there is no oxygen, or the organism cannot use oxygen for respiration. 
</span>
        
                    
             
        
        
        
This type of water transition or change in phase of matter is known as FREEZING. 
Water has molecules that are free flowing and have the ability to collide and bounce against each other, that's why it has that kind of characteristic that it takes the shape of its container. 
When these molecules are exposed to lower or colder temperatures, the molecules tend to vibrate and get attracted towards each other, creating a semi-solid or completely solid material. In this example, liquid turned into frost because of the low temperature present within the environment.
        
                    
             
        
        
        
C is the most likely answer to this question.