Final answer:
The correct conjugated verb is 'sepa' in the sentence 'Busco un poeta que sepa francés.'
Step-by-step explanation:
The correct option to complete the sentence is sepa. The sentence is asking for a poet who knows French, so we need to use the subjunctive form of the verb buscar (to look for) to match the uncertainty or doubt expressed in the main clause. The correct conjugation of the verb saber (to know) in the present subjunctive form for the third person singular is sepa. Therefore, the correct sentence is: Busco un poeta que sepa francés.
Learn more about Verb conjugation in Spanish