C) voltage gated sodium channels 
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Answer:
Polygenetic inheritance
Explanation
Polygenetic inheritance also called Multifactorial inheritance it occurs when a single characteristic is controlled by more than two genes .
An example is the human skin pigmentation which is determined by the amount of melanin it contains.
Melanin production involves at least four genes. A combination of of melanin producing allele determines the degree of pigmentation.
This shows each gene has exerted a small addictive effect in determining the trait.
 
 
        
             
        
        
        
Answer:
Its Decrease, Decrease, Decrease
Explanation:
I just did it 
 
        
                    
             
        
        
        
The correct answer is true.
        
             
        
        
        
Kelp forests are usually found at around 30m(= 98.4251969 feet). In my opinion the answer to your question is C. 18-90 feet. I hope that this is the answer that you were looking for and it has helped you.