Answer: a writing system in which wedge-shaped marks in clay tablets represent words and numbers
Explanation:
Because i have the same problem as you and i know the answer.
The Spartans were very good in hand to hand combat. The Athens had a very successful navy. The Athens made an invention of the ships so that, under multiple people at once would row and it would have to stay in that motion. There is more but I don't know what lesson you are on...
When you sit, you don't do as much movement, but if you run, your body makes more carbon, and also lose calories