Answer: It seemed as if she was alone on the streets.
Step-by-step explanation:
The narrator describes her experience of going to the carnival. She points out that the streets are empty at night, by using the word 'deserted'. Her surprise becomes obvious when she describes the same streets during the day as 'hectic'. There are many people outside as the stores are open. The author realizes that, in that particular moment, nobody is there. She does not hear the ordinary sounds of a living city. Because of the silent atmosphere, she hears the distant echoes of music coming from the park.