When you sleep you are most likely laying down. Without all the gravity pushing down on your spine your spine can expand. Throughout that day gravity pushes down on your spine and it causes your spine to shrink.
        
             
        
        
        
The correct answer would be a positive feedback loop. when contractions happens its to help get the baby out and to let you know when the baby is coming so when the contractions start it means you are going into labor. 
        
                    
             
        
        
        
Answer:
The correct option is true. 
Explanation:
A forester can simply be described as a person which practices the art of forestry. Such a person is involved in managing a forest. The job of a forester might be given by the government to ensure the proper maintenance of a forest or it might be through a private company. Nowadays, the government of the USA is hiring bachelor level or master level people for this job so that a forest can be managed more properly.
A forester works best to conserve the art of a forest and he takes special care to preserve the wildlife animals and plants of the forest. 
 
        
                    
             
        
        
        
The correct answer is, C. Homeostasis; Homeostasis maintains a stable condition of the body.