Final answer:
The correct interrogative word to complete the question is dónde.
Step-by-step explanation:
The correct interrogative word to complete the question is dónde. The question is asking for the location or place where the speaker is from. The interrogative word dónde is used to inquire about locations. For example, if someone wants to ask 'Where are you from?' in Spanish, they would say '¿De dónde eres tú?'.
Learn more about Using interrogative words in Spanish questions