Which life process ensures that human species will not disappear from this earth?
Reproduction
Reproduction is essential for the survival of a species on this earth. It ensures continuity of life on earth. For example, human beings reproduce by giving birth to babies(sons and daughters). These babies grow and ultimately become adults. So, when the old parents die, their son and daughters continue living on the earth. These sons and daughters also reproduce and give birth to babies, and this process goes on.