Im not sure if this will be the answer you teacher is looking for but i think the answer would be 
Hair on the head protects scalp from injury and sunlight
Eyelashes and eyebrows protect eyes
Nostril and ear hairs protect from foreign particles
 
        
             
        
        
        
The correct answer is B) Prairies wind erosion usually happen in deserts and coastal sand dunes and beaches, certain land conditions will cause wind erosion in agricultural areas.
        
                    
             
        
        
        
Answer:
D) -4
This is because each term is four less than the previous term.
Explanation:
 
        
                    
             
        
        
        
I believe its D. response neuron.
Hope this helps!
Love, Grace-