Why we need sleep?

When we we donibg any work the brain cells are initiated during this initiative process neurotoxic is developed in brain .which make harm to brain cells .to reduce this We need sleep regularly

More than that for gathering new knowledge also we need sleep .sleep makes brain as a fresh  .
for example
A cricket match was played in a ground after that the ground should be clean and make the ground for a new match .

Like wise after a good sleep our brain is like a clean play ground .After sleep the brain is ready to accept a new thing .There is another one thing when we doing a work after that work we should give rest to brain to store the previous work that have done .

For example

If we storing a data to pendrive. It will that some time to store data .

Like wise we should give time to store data that is sleep .....

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