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The soul may not die and move to some place which we do not know. But the our body does die after our death.
You can think of it as like soul getting seperated from the body and when this happen the body is dead useless.
The concept of death is very complicated and no one will ever know the exact process.
The body is only the physical structure the soul occupies for some time. After it's use it converted to bacteria food or ash, the soul finds a new host.