Jehovah's Witnesses believe 'hell' is literally the grave. Therefore all who die go to the grave or hell. However they do not believe that hell is a place of everlasting torment, fiery or not.
They believe that all who die before Armageddon will be resurrected back to earth for another chance to prove themselves worthy of everlasting life on a Paradise earth as they believe was the original intention at Eden.
All those who die at Armageddon will not have another chance.
I believe it just dies off nothing happens
No, not in my experience. At least, not by other Witnesses.
yes
Yes.
A child who keeps getting reincarnated.
Abraham's sister dies by giving birth to her child.
When a king dies and the heir is a child, a regent is usually appointed to rule in the child's place until they are old enough to take the throne themselves.
Every 7 seconds a child dies.
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Her husband or her parents
a child dies
No, child support is established to Support the Child. There are usually clauses within a Divorce decree or Separation agreement that indicate when Child Support stops -- usually at eighteen, or if the chidl marries, or if the child dies.