What is common in the natural conditions of Ancient Egypt and Mesopotamia? in the time of the emergence of states?

Common features of the natural features of Egypt and Mesopotamia were:

warm climate all year round;
the presence of great rivers and large flooded areas;
fertile territories were surrounded by deserts.

From the point of view of the time of the formation of states, both of these civilizations began this process when agriculture was sufficiently developed. This made it possible to create large settlements, which later became capital cities, to develop trade relations within the country and with other peoples to a high level, etc.