The correct answer is - to motivate Americans to strive for the development of their nation
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President Kennedy says: 'ask not what your country can do for you—ask what you can do for your country.' It is clear that he wants people to work together in order to 'make America great again.' He believes that if the country is prosperous and successful, then the people will become happy and satisfied as well. He wants to motivate his fellow Americans to work together towards a common goal of bettering their own country.
The right answer for the question that is being asked and shown above is that: "to motivate people everywhere to uphold the freedom of humankind."Based on the excerpt, the central idea of this speech is that <span>to motivate people everywhere to uphold the freedom of humankind</span>