Answer: It is a smaller planet-like sphere orbiting a planet.
Explanation: A planet is usually a mid-sized, life-sustaining, sphere. Any 'ball' smaller than the planet that orbits the planet, is a moon.
The Harappan civilization is the last of the Neolithic Civilizations. They were the main founders of iron and helped create the iron age, which becomes important in the time that follows. They were located along the indus river and were considered one of the biggest accomplishments of the Indus Valley civilization.
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In 313 AD, the Emperor Constantine issued the Edict of Milan, which accepted Christianity: 10 years later, it had become the official religion of the Roman Empire.