In <em>The Times are A'Changing</em> by Bob Dylan, we can best observe his opinion about change. In this song, the speaker tells the audience as a general public and as specific people (journalists, politicians, parents, etc.) that times are changing and they need to adapt and change as well. He clarifies that those who won't change, will face imminent failure in various degrees.
The best answer for the underlined word would be A: Vital
crucial means important or urgent.
required could be it but it does not imply a great amount of necessity.
The rest of the options don't even relate to this question.
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Answer:
Look up John F. Kennedy's Inaugral Address.
Answer:
Gabrielle is writing a research paper on the physiological effects of commonlyused drugs, such as caffeine