Diana is a postgraduate student in anthropology, and she is studying the descent system followed by a tribe in Africa. She observed that the tribe had a
✓ lineage as the children used to choose to claim inheritance from either of their parents. The tribe
was arranged in the form of a
where people claimed relationship to an ancestor through a series of male links.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.