Final answer:
The appropriate form of 'tener' is 'tienen' as it agrees with the subject 'Uds.' in the dialogue.
Step-by-step explanation:
In the dialogue, the question is asking 'Do you all have hunger?' and the response is 'Yes, very hungry.' The appropriate form of the verb 'tener' (to have) to fill in the blank is tienen because it agrees with the subject 'Uds.' which is the abbreviation for 'ustedes' meaning 'you all' in Spanish.
Learn more about The verb 'tener' in Spanish