A homophone is when two words sound the same but have different meanings and spellings.
For example:
night - when it is dark out
knight - a medieval protector of the kingdom
They sound the same, but their meanings are different.
The sentence which uses the passive voice form is option A. A path of destruction was left by the twister. A passive voice construction has no direct object which directly receives the action of the verb. In this kind of sentence, the object becomes the subject instead.
The answer is c. climax is the highpoint in the story