It’s definitely b 
hope this helps
        
             
        
        
        
<span>The birth of more offspring than can survive.</span>
        
                    
             
        
        
        
Answer: increase in genetic variation 
Explanation:
 
        
             
        
        
        
The answer is D. Transports fluids throughout the plant.:)<span>
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Answer:
Algae and sunlight
Explanation:
Algae provides nutrients to planktons enhancing their growth. The planktons are photosynthetic in nature. Energy from the sunlight is used by planktons during photosynthesis to make their own food thus increasing its population.