Water "is considered to be an essential for human life, because the human body consists of 70% water, which is an internal system of the human body requires water in order to perform the duties of a physical system.
Water "is necessary for the survival of mankind. Because the human body consists of water by 70%, which is within the human body. The need for water in the functioning of body systems.
Water "that is necessary for human being. Because the human body is composed of water to 70% which within the system of the human body. To use the water in the functioning of the body system.