If you've ever shopped for produce in a U. S. grocery store, you've probably seen yams and sweet potatoes on display. Generally, the ones labeled "yams" have reddish skin and orange flesh, while the sweet potatoes have gold-colored skin and white flesh. Yet scientifically speaking, those yams aren't yams at all; they're really a variety of sweet potato. True yams are native to Asia and Africa and belong to their own family of plants. They have rough, bark-like brown skin and dry, starchy flesh. True yams are not often stocked in U. S. grocery stores. Sweet potatoes, on the other hand, belong to the morning glory family of plants and are widely grown in the United States. Unlike true yams, which are tubers, or
underground stems, sweet potatoes are roots, like carrots.

What is the main idea of the passage?
A:True yams are grown in Asia and Africa and are not often sold in the United States.
B:True yams are tubers, or stems, while yams sold in U. S. grocery stores are roots.
C:True yams are starchy tubers from Asia and Africa, while U. S. yams are a type of sweet potato.

A:True yams are grown in Asia and Africa and are not often sold in the United States.

This is correct because the author starts comparing the two yams at the end and we realize the U.S doesn't even have yams and they are mistaken. They really grow in Asia and Africa is what the main idea is.

B is not correct because it is just the description of the yam, but it wasn't the point of the passage. The author used this detail to get to the main idea.

C is not correct because of the misinformation. While the first half of the answer is true about Asia and Africa grown yams, it says then they are a sweet potato in the U.S. That's what they are said as in the U.S, but the point of the passage was to clear up what yams really are and where they originate.

A:True yams are grown in Asia and Africa and are not often sold in the United States.

Explanation:

the speech this question is referring to is president kennedy's special message to the congress on urgent national needs, may 25, 1961

kennedy responds in a very direct and concrete way to those thinking that communism is a positive system:

"yet their aggression is more often concealed than open. they have fired no missiles; and their troops are seldom seen. they send arms, agitators, aid, technicians and propaganda to every troubled area. but where fighting is required, it is usually done by others--by guerrillas striking at night, by assassins striking alone--assassins who have taken the lives of four thousand civil officers in the last twelve months in vietnam alone--by subversives and saboteurs and insurrectionists, who in some cases control whole areas inside of independent nations." (kennedy)

president kennedy presents communism as cowardly, as a hidden and treacherous weapon that strikes from the shadows like thieves, he represents the system as not even being capable of showing and open and overt attack or confrontation. to finish up the response, he expresses that the system attacks even a country's idependence and freedom.

animal farm, written by george orwell, is a representation of russia after the revolution that led stalin to take over power.

in this excerpt, the central idea seems to be that the animals (a representation of society), when they believe to be working for a greater good and equality, are obedient and productive. they were convinced that, after expelling the owner (jones) from the farm, they would live in harmony and be fairly treated.

as we know, the pigs become the leaders and grow more selfish and dictatorial with time. in the end, they look and act in a way so similar to humans that it is impossible to tell the difference. the ideals of equality are shattered, and the farm turns out to be worse than it was before. the animals are manipulated with false propaganda and forced to work in order to enrich the pigs.