The prospect of new lands to be taken/businesses be built. People wanted money!!!
Answer:
a,b,c are correct... take for example Indus valley civilization
A lot came from human fossils and animals, also from paintings in caves.
A scribe is the designated writer in many societies. In Sumer, scribes were the ones who knew how to write. The general citizen was not usually educated in how to write, and so they had to ask the scribes to do any writing necessary.
Hope this helps! :)