The correct answer is option 1) i.e. Flyer.From the first part of the analogy, we can conclude that a noun is needed after its corresponding verb. Similarly, 'fly' is our verb and we need a corresponding noun i.e. 'flyer' ( flying and flew is a verb and flighter is not a word).The noun form of the verb 'Fly' is 'Flyer'. Hence it is the correct fit in the second part of the given analogy.