They heard a shot come from an unknown area, and were afraid it was coming towards them.
The answer is D. India developed and maintained a securely centralized and powerful empire that lasted for centuries.
The Babylonian economy was largely based on agricultural surplus (due to irrigation systems) and trade. They traded both crops and goods like gold, silver, etc.
aeronautical is one adjective..I am looking for the rest
The Auryans established a Imperial government in their empire. the King was the supreme head of the administration.