Final answer:
The correct verb to fill in the blank is 'saben' which means 'know' in the context of the sentence.
Step-by-step explanation:
The correct verb to fill in the blank in the sentence is saben.
'Mis padres' is the subject of the sentence, and in Spanish, the verb 'saber' is used to mean 'to know' when talking about knowing information or facts. The form 'saben' is the third-person plural form of the verb 'saber', which agrees with the subject 'Mis padres' (my parents).
Example: 'Mis padres saben hablar español' means 'My parents know how to speak Spanish'.
Learn more about Spanish verbs