The speech President Kennedy's Report to the American People uses logos, ethos, and pathos, which are

historical contexts.
inaugural addresses.
parallel structures.
rhetorical appeals.

teenagers are certainly stereotyped as moody.

most people view teenagers as naturally moody and grumpy, even when this is wrong. many teens are suffering from depression but it is brushed off as "just a phase" or "that's just cause they're a teenager"

scholarship is an sc because, by definition, a subject complement is the adjective, noun or pronoun that follows a linking verb, for example the verb be (in any of its forms).

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