It is false. It slows down activity.
B. recreational activity's such as walking, throwing, or riding a bike to school
Your brain has nerves and those nerves run throughout your system so in that case your central nervous system control everything. It is like a director it tells your heart to pump blood it signals everything it even control your homeostasis and reflex.
You should do your weight divided by your age and the number in total is the amount of water you should drink a day to be healthy. <span />