Drag the tiles to the correct boxes to complete the pairs. Match each disease or symptom with the nutrient deficiency that causes it.

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle

Answer(d) they all send signals from the brain to the body through long axons in the vertebral column;