In the middle east, a is a dry riverbed that often fills briefly with water after strong rains. a. nafud b. wadi c. shamal d. dam

The right option is; B. wadi

In the Middle East, a wadi is a dry riverbed that often fills briefly with water after strong rains.  

Wadi is a dry river bed or valley of a stream that is usually dry except during the times of heavy rain. Wadi is situated in regions of southwestern Asia and northern Africa. The sediments inside wadi is composed of complete range from gravel to mud along with large range of sedimentary structures.

it would be d). more resources must be obtained to attain that combination of goods and services

answer do so moderately;