A. Science cannot answer philosophical questions. Philosophical questions could be described as rheoretical questions, such as "what is the purpose of life?" These questions' answers can very from person to person. Science answers questions such as "what is the boiling point of water?", or "what is the chemical structure of water? These are both questions that have the same answer, no matter who is asking them. You just have to have the ability to accurately measure and observe the things involved, or in this case, the temperature of the water when it starts to boil or whe different atoms in the water.
Let's examine the other questions.
B. science can answer only mathematical questions. As you saw in the explanation above, science can also answer other questions, as long as they have a definite answer that we can accurately measure.
C.Science can answer any questions. Again, we have already saw that science cannot answer philosophical questions, so science cannot answer any question.
D. Science can answer any difficult questions. As with the example of the chemical stucture of water, we can answer difficult questions with science. This may seem simple to you, but it would be very difficult if it was not already known!
 
        
                    
             
        
        
        
The answer is Crescent. 
<span>During a crescent moon, we see one whole side of the Moon here on Earth.
</span>
<span>New moon              -</span><span> the illuminated side of the Moon is away from the Earth. only
 the shadowed side can be seen. </span>
><span>Waning gibbous    - </span><span>the Moon is less than fully illuminated, but, is more than
half.</span>
<span>>Full Moon            - Brightest lunar phase.</span>
 
        
        
        
No beacuse the other layer may be to cold or hot for humans to survive in 
 
        
             
        
        
        
I believe the correct answer is upwelling. Lets say we have producers such as plankton. well upwelling currents bring dead matter from the ocean floor up to the surface, creating plankton.
        
             
        
        
        
Answer:
B. runoff of nitrates from fertilizers applied to the golf course
Explanation:
Algal bloom is defined as the rapid growth of algae in freshwater or marine water. Algal bloom is green or yellowish in color that cover the top layer of water systems.
Algal bloom in the given case is caused by the excess of nutrients that is nitrates from fertilizers into waters and higher concentrations of nitrates causes uncontrollable growth of algae.
Algal blooms are harmful for environment as they may produce toxins and can block the sunlight from reaching the plants and animals in the water systems.
Hence, the correct answer is "B. runoff of nitrates from fertilizers applied to the golf course".