Answer:
The land was so fertile because of the big amounts of silt that the rivers brought to their shores.
Explanation:
The river valleys of Tigris and Euphrates in the Middle East, and the Nile in Northern Africa, were the places were the two earliest civilizations arose. These two civilizations were Sumer and ancient Egypt. The main reasons why these two civilizations developed were exactly the aforementioned rivers and their valleys.
Tigris and Euphrates on one side, and the Nile on another side, were bringing in enormous amounts of silt to their shores each year. The silt was making the river valleys highly fertile, which in turn meant that the people can engage in large scale agricultural production. Because the people had good conditions for the big production of agricultural goods their food supplies were guaranteed, so they were able to specialize in other fields and gradually develop into real civilizations.
<span>A continent is a physical thing and a cultural region is a social or human thing. The continent of Europe is attached to Asia on the east side and sticks into the Atlantic Ocean on the west side. It runs from the high arctic to the Mediterranean Sea in the south. Culturally, Europe is the home of the ancient civilizations of Greece and Rome with Slavic peoples in the east, Latin people in the south and Germanic people in the north. European cultural groups used superior technology in the last 500 years to colonize much of the rest of the world.</span>
