The answer top the question given above is letter c. Surface currents. 
There are two types of ocean currents, surface current and deep currents. 
Surface currents which are caused by winds,move warm water
away from the equator and cool water away from the poles. Deep currents on the other hand are driven by differences in water density.
        
             
        
        
        
The greatest advantage of using DNA technology to produce medicines has been that B. medicine can be distributed at a reduced cost. The medicine becomes easier to produce due to DNA technology. One may consider insulin as an example of this, which had to be extracted from the blood from animals before it could be produced using DNA technology.
        
                    
             
        
        
        
O D the seasonal movement of organisms between locations mark me as brilliants
        
             
        
        
        
<span>the large population becomes smaller.
also, bottleneck is when a large population quickly shrinks. the effects of genetic drift becomes much stronger.
e.g: seals
alleles can be lost during bottleneck and the number of alleles left can shift dramatically in just a few generations.</span>
        
             
        
        
        
Answer:
1. We all are at risk for getting and spreading the flu. Having the flu may keep you home from work or school, not to mention making you feel pretty miserable for a week or two. If you have asthma or other lung diseases, you are at higher risk of developing complications from the flu.
Explanation:
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