Why It Is Important To Balance The Nature?

For the same reason we inhale and exhale. It is believed that at the point of creation there must be balance, negative and positive energy in order to produce and and sustain the life force.  Without it disease, discord are the result.  If the body has a proper chemical balance, it is said to be in good health.  If the were more predators than prey in nature , then prey would die off or be killed in order to have the proper balance restore.  If there is a shortage of food to eat or shortage to people to eat food. Either the food would go to waste so to speak or people would perish for the lack there of . So it is necessary the balance  maintained. If the earth were not balanced on its axis than the results could very well be cataclysmic.  

Without negative and positive, energy could not be created thus no life.  This question is a very good one yet it would take up a great deal space and probably volumes of books to answer this question.  Last be not least Balance is not just a nature law but a universal law as well.  Balance is one of those immutable laws that can't be negated.