How does cerebrospinal fluid protect the Brain and spinal cord

It provides a fluid buffer which acts as a shock absorber that absorbs any kind of mechanical injury.

Explaination:

The cerebrospinal fluid is a clear watery protein- free substance that surrounds and protects the brain and spinal cord and also serves as nutrient delivery and waste removal system for the brain.

Protection:

It basically provides lubrication between bones and spinal cord & between the skull and brain. When the victim suffers from a head injury, the fluid acts as a buffer that absorbs or dulls the force.

cerebrospinal fluid acts as a shock absorber from some forms of mechanical injury.

Explanation:

CSF protects the brain which basically floats. It serves to minimize damage from blows to the head and neck. CSF surrounds or bathes the brain and the spinal cord. It's a clear, watery and almost protein-free liquid that acts as a fluid buffer for the protection of the nervous tissue.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

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