Answer:
development of the myelin sheath
Explanation:
Motor development: The term motor development refers to a process that involves a child's development of muscles and bones and the capability to manipulate and move over the surrounding environment of the child.
Types:
1. Fine motor development.
2. Gross motor development.
Development of the myelin sheath: Each myelin sheath in an individual's body id being formed via concentric wrapping of Schwann cell and an oligodendrocyte which is found around the axon. The development of an individual's myelin sheath is responsible for motor development.
I think it’s b not sure tho
