Answer:
Cells divide so living things can grow. When organisms grow, it isn't because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.
Maybe because of global warming and the glacier water melting makING it bigger and deeper. (I hope this is the answer you are looking for)
Mutuaism
because they both benift from each other
The respiratory and circulatory systems are close together by working and relying with each other. The respiratory system imports oxygen from the air and that oxygen goes through out the body by the circulatory system pumping the oxygen. That creates carbon dioxide, which the respiratory exports from the body.