In the field of neuroscience, understanding the different types of glial cells is essential for comprehending their roles in maintaining homeostasis and supporting neuronal function. Among the various glial cells, which type is specifically responsible for the formation of the myelin sheath in the central nervous system (CNS)? This myelin sheath is crucial for increasing the speed of action potentials along axons. Considering the following options, identify the correct type of glial cell responsible for this function.