Fish, water, food, and trade and transportation
ancient china, babylon, india, and ancient egypt
The four natural barriers 1. Cataracts of the Nile 2. Sea 3. Desert 4. Mountains
The first four civilizations are Indus (India), Yellow (china), nile (Egypt), and Mesopotamians
2+2=4
Unearthing Ancient Secrets - 2009 Egypt's Animal Mummies 2-4 was released on: USA: 4 January 2013
1. water 2. food/duck, fish, birds 3. papyrus 4. soil
The Care Bears - 1985 The Most Ancient Gift Ski Trouble 4-15 was released on: USA: 1988
well it has got 3/4 of the world's monuments and the river nile nad two seas
The Care Bears - 1985 The Most Ancient Gift Ski Trouble 4-15 is rated/received certificates of: Australia:G
They traded ideas, animals, food, and tools.
The Egyptian civilization around the Nile river, the Mesopotamian/Sumerian civilization around the Tigris and Euphrates, the Indus Valley civilization of Harappa and Mohenjo-Daro around the Indus river, and the Chinese/Shang civilization around the Yellow river.
I think it is: flooding good soil good crops transportation I'm not entirely sure but I think it is. Hope this helps. :)