The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The common feature of the Bronze Age civilization was that humans started to create tools and weapons made of bronze, and ending the so-called Stone Age.
The Bronze Age is considered to be the first time humans worked with metals, in this case, bronze.
Historians consider that it was the Sumerians the ones that started to use bronze in their city-states. These Sumerians settled in the middle of the Euphrates and Tigris Rivers, in the Middle East. There, they established powerful city-states such as Lagash, Ur, Uruk, Kish, Eridu, and Nippur, and they built impressive Ziggurats because they were symbols to honor their gods.
