Letter A. The statement that best describes 21st-century migration flow to the United States is that l<span>arge numbers of immigrants and migrant workers, including skilled and unskilled laborers and many with advanced degrees, are coming to the United States from South and Central America.</span>
Answer:
its the crust and a little bit of the upper mantle
Explanation:
Answer: Their arrival came just after, or perhaps helped bring about, the fall of the previously dominant Mesoamerican civilization, the Toltecs.
