The correct answer to this question is B, Life Cycle. This cycle is the changes that an organism goes through during life. A new life cycle occurs when a specific set of changes begin. All organisms go through a developmental stage.
Many conditions affect the environment, including light, water, and temperature. The life cycle of a mammal starts with an egg. The egg then turns into a fetus. Once the fetus is born, it grows into a juvenile and then, an adult. Birds have a different life cycle. The start with an egg, turn into a chick, and then an adult.