The correct answer is:
The word quixotic is most clearly defined as idealistic but impractical.

Answer:
1. Invented
2. Is
3. ...this will happen
4. ... further discussion is useless
5. Celebration
Explanation:
1. George Ferris was the inventor of the Ferris wheel used in amusement parks.
2. The verb is that links the subject with the complementive predicate.
3. The causal adverb if has to be followed by something provoked by the action mentioned in the first part of the sentence.
4. Like in nr. 3 the conjunction of reason since demands another action.
5. Kwanzaa is a harvest celebration
JajajbsbabajosinanNAjajajl alnanwija a
Essentially 3. He stated that readers minds would "require a change of diet" and that stories should be read in one sitting to "capture the essence" of it.