Both neuroglia or "glia" and neurons can be found in the CNS.  The difference between them is that aNeuroglia do not divide and neurons do bNeuroglia divide and neurons do not cBrain tumors tend to be made up of neurons dThere are no differences between neurons and neuroglia

The correct answer is b. Neuroglia divide and neurons do not. This is a key difference between the two. Neuroglia, or glial cells, are non-neuronal cells in the central nervous system (brain and spinal cord) and the peripheral nervous system that do not produce electrical impulses. They maintain homeostasis, form myelin, and provide support and protection for neurons. Unlike neurons, glial cells can divide and proliferate in an adult brain.

Additionally, most brain tumors are indeed made up of glial cells, not neurons. This is because glial cells can divide and multiply, whereas neurons, in general, cannot. This makes glial cells more susceptible to becoming cancerous. So, while it's not a choice in your question, it's worth noting that most brain tumors are made up of glial cells, not neurons.