Final answer:
The sentence contains the correct imperfect form of the verb to describe a past habit or background information.
Step-by-step explanation:
The imperfect form of the verb in the sentence “Rosa vivía en Londres” is correct.
The imperfect tense in Spanish is used to describe ongoing or repetitive actions in the past. It is often used to talk about habits, routines, and background information.
In this sentence, the verb “vivía” (the imperfect form of “vivir,” which means “to live”) indicates that Rosa used to live in London, highlighting a past habit or background information.
Learn more about Imperfect tense in Spanish