Which of the following is an essential life process for survival?
Circulation
Nutrition
Respiration
All of them are essential life processes except reproduction. Reproduction is essential for maintenance of individuals of species over generations. Circulation is the movement of blood through the body that is caused by the pumping action of the heart. Nutrition is the process of providing or obtaining the food necessary for health and growth. Respiration is a set of metabolic reactions and processes that take place within the cells of organisms.