Lichens shrubs small trees forest
        
             
        
        
        
Answer:
The correct answer would be -
A. The number of deer would increase
D. The vegetation in the forest would decrease.
Explanation:
If a large number of hunters or predators are removed from an ecosystem, then there will be, the change that will be found would be increase in the numbers of the prey in the ecosystem. Due to this increase in the numbers of prey the food resources would decrease. 
In the given case, the number of deers will increase in absence of enough predators which will lead to overgrazing that will decrease the vegetation in the ecosystem.
 
        
                    
             
        
        
        
<span>The sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. The parasympatheticnervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.</span>
        
             
        
        
        
I would assume that centipedes would die if you cut them in half because you would cause them to bleed out and cut off some vital organs from the brain.