What are the challenges of consonant/vowel alternations?

The study of English vowel alternation has traditionally been done in an indirect manner, in conjunction with diachronic drawings of the English sound system or expositions of English morphophonemics. Rarely

Has it been presented with a significant degree of historical and cultural independence?

grammar. Despite this, vowel alternation is so common, so varied in pattern, and so potentially harmful in English.

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.

the correct answer is c. usually the language, and its emotional insight, that is how feelings and attitudes are expressed through language, are not quite present in film adaptations. despite that, it is a factor that a fan may either not notice or not care much about, especially compared to the other factors.