13-15. Fill in the blank with the correct stages in the human life cycle. 13. The start of the human life cycle begins after the baby is delivered out by its mother to the world. 14 Takes place between ages 1 to 10. The first 2 years, the child is called a toddler. During this time, the child learns how to walk, talk and be more self- sufficient. The child is susceptible during this time to learned habits and behaviors. 15 takes place between ages 12 and 18 and is a critical turning point because it is when puberty takes place. Boys' voices change and girls get their periods. As such, they begin to separate more from the parents and become more independent​