The huang he a. drains the xi/pearl river basin b. flows into the south china sea c. almost encircles the ordos desert d. flows from the loess plateau eastward toward its mouth at shanghai

The correct answer is c. almost encircles the Ordos desert.
The Huang He River has an interesting circle like movement around the western, northern and eastern part of the Ordos desert, which almost makes it look like it is wrapping the Ordos desert around with it's waters.