The correct answer is haifi.
The question is asking which word is the verb (aikatau) in the sentence. In the sentence "Wata akuya baka ta haifi tagwaye", "haifi" is the
verb meaning "gave birth" or "had", while the other options - akuya (goat), baka (your), tagwaye (twins), and wata (a/she) - are all nouns
or pronouns. Therefore, the correct answer is haifi, as it is the verb describing the action in the sentence.