Answer:
D
Explanation:
It helps stop floods by making an artificial “lake”
I'm not sure what yours asking, but The Space Shuttle<span> Challenger broke apart 73 seconds into its tenth mission on January 28, 1986. </span>
Federalism has evolved over the course of American history. At different points in time, the balance and boundaries between the national and state government have changed substantially. In the twentieth century, the role of the national government expanded dramatically, and it continues to expand in the twenty-first century.
