Answer:
I think it's because it will decay and be soil and soil is biotic factor
 
        
             
        
        
        
Answer: 
D. Spinal nerves have mixed motor and sensory function.
Explanation:
spinal's nerves are mixed nerves, which means that they carry sensory and motor information. They carry sensory information to the central nervous system to give a motor answer that will travel through the spinal nerves to specific muscles. The White matter, which is peripheral in the spinal cord, contains axons while the gray matter, which is central in the spinal cord, contains cell bodies.
 
        
                    
             
        
        
        
Answer:
A. Because energy is lost at every level.
Explanation:
energy decreases as it travels from lower levels to upper levels--which is a logical observation you could make. 
Think of it like this--if a fish eats a small organism, it will then spend some of the energy obtained from the organism swimming around--so when a larger fish eats our fish, the energy from the original organism will already be partially lost (from our fish swimming around). 
This means that when this pattern continues over multiple levels, we keep losing energy--which limits the environment's capacity for organisms to survive. 
Hope this helps, have a lovely day :)
 
        
             
        
        
        
Answer:
the first one i think is d
 
        
                    
             
        
        
        
<span>It would increase the water extraction due to the counter current multiplier system.</span>