Answer:
Description 1: "This need grew with the growth of the population" -: Skilled workers
Description 2: "Largest group of immigrants" -: Slaves
Explanation:
In the United States or Western Hemisphere contest, it is widely known that aside from European colonists or settlers, the largest group of immigrants are the slaves, which was a result of the majorly trans-Atlantic slave trade from West African territory.
On the other hand, in the process of developing the region of the United States and Western Hemisphere generally, there is a need for skilled workers in the industrial sectors of the country. For example infrastructural development, health care system, etc.
Hence, the correct answer in this case is:
Description 1: "This need grew with the growth of the population" -: Skilled workers
Description 2: "Largest group of immigrants" -: Slaves
To make America economically independent from other countries.
"<span>D. His efforts to end poverty were hurt by the enormous cost of the war in Vietnam" is true. There were also political push-backs from opponents, however. </span>
They were hindered by economic development and lack of enforcement, so I'd say 1. Cost, because no one would pay for it.