Robert Havighurst identifies how many major groups of developmental tasks for elementary children?

Robert Havighurst, a prominent educational psychologist, articulated a framework of developmental tasks that children typically go through as they grow. For elementary-aged children, he identified nine major groups of developmental tasks. These tasks are designed to help children develop in various aspects, including physical skills, social relationships, and emotional understanding, which are crucial during the formative years of childhood education. Each of these tasks is essential for nurturing a child's overall development and readiness to transition to subsequent life stages. Understanding these groups can help educators and caregivers support children's growth and address their needs effectively during this pivotal time in their lives.

The other choices do not align with Havighurst's framework for elementary children; hence, they do not reflect his research accurately.