Yes, it is true that slash-and-burn agriculture helped keep the soil fertile for early farmers, since this kept the soil rich with nutrients from the remains of the crops that were harvested.
I would say that the best tools for establishing and preserving freedom are the Constitution, courts, and legislature in general.
The Constitution is a set of laws that all people within one country should follow and it is a document which guarantees their freedom and equality. Courts and other laws do the same thing as well.
The correct answer should be<span> c. in the department of commerce
The first ever regulatory agency was the </span><span>Interstate Commerce Commission which was formed in 1887 by the congress to oversee commerce. Therefore the correct answer is C because the other ones don't have many things to do with commerce.</span>