Which of the following soil-building processes contributed most to making the shaded area on the map suitable for agriculture?

A. Irregular rainfall from the monsoon rains led to frequent
floods and droughts east of the Mediterranean.

O B. Hot summer winds carried sands from the Arabian Desert
into the marshy area to the northeast.

C. Glaciers from the Zagros Mountains melted into mountain
streams that carried rocks and boulders to the shaded
regions.

D. When rivers flooded, they deposited rich silt onto the
surrounding floodplains.

D. When rivers flooded, they deposited rich silt onto the

surrounding floodplains.

Explanation:

Looking at the diagram, the soil-building processes that contributed most to making the shaded area on the map suitable for agriculture is "When rivers flooded, they deposited rich silt onto the surrounding floodplains."

From the diagram, the shaded area is chart resized by Tigris and Euphrates rivers. Both rivers are essential natural features in the area. These rivers served many purposes to the inhabitants, some of which include irrigation systems.

However, these rivers also serve as a silt carrying agent, and they deposit such silt into the surrounding flood Plains.

c, this answer is productivity.

i think it would be cleaveland browns