Question

review the text.
the greatest dam in the world
1 hoover dam is a massive concrete dam on the colorado river, sitting at the border of arizona and nevada. before the building of hoover dam, the colorado river was dangerous and unreliable. melting snow in the mountains caused damaging floods during the late spring and early summer. unpredictable flash floods could occur in any season. but by midsummer, the rivers flow was barely enough to supply the farms in southern california and arizona that depended on it.
2 in 1905, the colorado river flooded what had been rich, irrigated farmland in the imperial valley in southern california. it caused enormous damage
order the key details to create a summary of the text.
congress authorized the ambitious plan to construct the hoover dam.
the unstable colorado river frequently wreaked havoc in surrounding regions.
the hoover dam is 726 feet high and supports one of the largest reservoirs in the world.
the construction of the hoover dam inspired confidence during the great depression.

Explanation:

To solve this, we analyze the text and the options:

1. The text first describes the problems with the Colorado River (floods, unreliable flow, 1905 flood damage). So the first key detail is "The unstable Colorado River frequently wreaked havoc in surrounding regions."
2. Next, the need for a solution leads to Congress authorizing the dam: "Congress authorized the ambitious plan to construct the Hoover Dam."
3. Then, details about the dam itself: "The Hoover Dam is 726 feet high and supports one of the largest reservoirs in the world."
4. Finally, the dam’s impact during the Great Depression: "The construction of the Hoover Dam inspired confidence during the Great Depression."

Answer:

1. The unstable Colorado River frequently wreaked havoc in surrounding regions.
2. Congress authorized the ambitious plan to construct the Hoover Dam.
3. The Hoover Dam is 726 feet high and supports one of the largest reservoirs in the world.
4. The construction of the Hoover Dam inspired confidence during the Great Depression.