Question

Three civilizations which existed at the same time​

Answer 1

Answer:

Encyclopædia Britannica, Inc. All the major ancient civilizations—in Mesopotamia, Egypt, the Indus valley, and China—emerged in the 4th millennium bc. Historians still debate over which one emerged first. It may well have been in the Middle East, in an area called the Fertile Crescent.

Answer 2

Answer:

Mesopotamia, Ancient Egypt, Ancient India, and Ancient China are believed to be the earliest in the Old World. The extent to which there was significant influence between the early civilizations of the Near East and the Indus Valley with the Chinese civilization of East Asia (Far East) is disputed.