The best answer for this question would be:
2. Cosmic Background Radiation
The Cosmic Background Radiation are when the heat of a planet is measured by the left over heat of it. This is based on the “Big bang Theory” wherein the planets were formed because it was once a very hot radiation.
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Black slaves who wgere imported from africa
Peace allows the country to be settling and in harmony. There won’t be any violence or corruption or wars when your in peace.