<span>Distribution of mineral deposits would be the answer since 'economy' deals with deposits as the rest of the answers deal with weathering and they don't include an economics. </span>
I think it might be chemical
Answer:
The Fertile Crescent was good for farming because of the fertility of its land, a result of irrigation from numerous large rivers in the region.
Advantages:
Irrigation and agriculture developed here because of the fertile soil found near these rivers. Access to water helped with farming and trade routes. Soon, its natural riches brought travelers in and out of the Fertile Crescent.
Disadvantages:
Since the world's earliest civilizations developed in the Fertile Crescent, it is not hard to imagine that there are many geographical advantages. The presence of two rivers and the sediment they leave behind after flooding made for successful crop surpluses. But the Tigris and Euphrates Rivers were also a disadvantage..
