Answer:subarachnoid space.
Explanation:Explanation: the cerebrospinal fluid is produced by the ventricles of the brain.it is the circulating fluids that surrounded the brain and the spinal cord.
These fluid supplies the brain and spinal cord with nutrients,removes wastes and protects spinal from trauma.
The lumps puncture is usually done to :
To determine any infection in theCNS (infalamtion of the brain amd spinal cord(meningitis).
To determine if there is bleeding in the CNS.
To Diagnose brain tumor or viral infection.
