This question has options. Select from options: Read this fact: "wind carries sand from one place to another place"

Now answer this question: "2000 years ago, this method would likely have brought sand from the coast to the desert"

Available choices:
1). the pyramids often eroded, making their own sand;
2). constant breezes over time;
3). human automobiles transfer materials;
4). the space shuttle moved sand great distances;
2).