what stage of development is this whenever levi cries, his parents seem to satisfy him by changis his diaper, feeding him, or holding him.

Which stage do you think this is?

http://en.wikipedia.org/wiki/Erikson's_stages_of_psychosocial_development

Are you sure you're taking a college level class?

The stage of development you are referring to is the infant stage, specifically the early months after birth. During this stage, it is common for infants to cry as a way to communicate their needs or discomfort. Levi's parents are responding to his cries by addressing his basic needs, such as changing his diaper, feeding him, or holding him. This is a typical parenting approach to ensure the baby's comfort and well-being.

If you want to learn more about the different stages of child development, you can refer to reputable sources such as parenting books, online parenting resources, or consult with child development experts. Additionally, observing the behavior of infants in different stages and talking to parents who have gone through these stages can also provide valuable insights.