<span>atmospheric perspective.
</span>
<span>Da Vinci is largely responsible for formulating the rules of the effects of light and air in the landscape. It was a </span><span>method of creating the illusion of depth, or
recession, in a painting or drawing by modulating color to simulate
changes effected by the atmosphere on the colors of things seen at a distance.</span>
That black people (not just slaves) had no rights in america and their fore couldn't even bring a law suit.
Answer: A. The abolitionist movement grew stronger.
<em>Dred Scott v. Sandford (1857)</em> was a landmark decision by the United States Supreme Court. It held that black people whose ancestors were imported into the U.S., whether enslaved of free, could not be American citizens. Therefore, they could not sue in federal court. Moreover, it ruled that the federal government had no power to regulate slavery in the territories acquired after the creation of the United States.
The decision was controversial, and greatly opposed by abolitionist groups. It strengthened the abolitionist movement and may have been a catalyst for the American Civil War.
Answer:
By 1900, the White House staff included one "secretary to the president" (then the title of the president's chief aide), two assistant secretaries, two executive clerks, a stenographer, and seven other office personnel.
Answer: He created the Centers for Disease Control to study the disease.
