The Great American dust bowl is the correct answer.
Explanation:
The Dust Bowl was the name that was given to the southern plains region of US which were drought-stricken. The southern regions suffered from severe dust storms during 1930. The winds and choking dust flew across Texas and Nebraska killing people and livestock. The crops also failed in the region. As the dust bowl intensified it crushed the economic impact of the great depression. Many farming families migrated in search of better living conditions and work.
The following action shows an example of periodization, driving history into different eras, such as the Iron Age and Bronze Age. The correct answer is A.
<u>A. the ability of a state or territory to decide for themselves whether or not to allow slavery</u>
Explanation:
Popular sovereignty is a political doctrine that states that the people of federal territories have the right to decide if they should become slave states. It was introduced in 1850 and first used in 1854 for the Kansas-Nebraska act.