Hip, spine and wrist I think.. not too sure. 
But hopefully it helps :))
        
             
        
        
        
Stimulus stimulate the sodium ion voltage gated channel to open in the axon. This allow many Na ion to enter the axon and causes depolarisation as the pd in the axon getting less negative charge (from -70mV to -50mV).
 
        
             
        
        
        
Answer:
d toxic algae blooms
Explanation:
because it is eutrophication
 
        
             
        
        
        
Plants need energy from the sun, water from the soil, and carbon from the air. The plant uses the carbon to form the leaves and stem and roots. I can go more into detail in the comments if you need.