Answer: Mesopotamia, china, indus River Valley, the mesoamerican empires..... in this case, the two rivers are the tigris and Euphrates. Mesopotamia. The name Mesopotamia was given to the middle eastern civilizations that existed between the Euphrates and Tigris Rivers. :)
The more advance the community the more complex the speciess
The correct answer is B. Traction.
Traction is the force that generates movement of objects that have a desire to remain immovable.
I'm pretty sure it would be D... If that's wrong I'm sorry.
