Final answer:
The appropriate imperfect verb for the sentence is 'estaba'
Step-by-step explanation:
The correct answer is OA. estaba. The sentence is saying 'When I was eight years old, I went to the beach with my family.' The verb 'estar' (to be) is used in the imperfect tense as 'estaba' to indicate a continuous action or a state in the past. In this case, it is used to describe the person's age at a specific time in the past.
Learn more about Spanish verb conjugation