Final answer:
The correct form of the verb is 'Había' in the sentence 'mucha gente en la calle'.
Step-by-step explanation:
The correct form of the verb in the given sentence is 'Había'.
In Spanish, the imperfect tense is used to describe ongoing or repeated actions in the past.
Since the sentence 'mucha gente en la calle' does not indicate a specific moment in the past but rather a general situation, the imperfect tense 'Había' is the appropriate choice here.
Learn more about Pretérito vs Imperfecto in Spanish