<span>Kennedy's claim in this excerpt was that since the US was capable of developing the technology to put a man on the moon and return him safely to earth before the end of the 1960s. This would prove that the US was better than the Soviet Union.</span>
<span>This is an analogy that you need to complete in order to see what the final word should be. So, exciting is an adjective that describes the noun thrill. So, in order to finish the analogy, you need a noun that the adjective difficult refers to. That noun could be ordeal, hardship, trouble, torment, torture, etc. You need a word that means "something difficult," so any of those words could be the correct answer.</span>
The correct statement about round character is that round characters are dynamic, with multifaceted traits developed in their story lines.