Analyzing Contrasting Themes in Word Choice

Read the following excerpt from a literary passage:

"The cacophony of the city pulsated around her, a vibrant tapestry of sound—shouts of vendors, the hum of conversation, and the sharp clash of cymbals from a nearby street performer. Each noise seemed to immerse her deeper into the heart of urban life, yet beneath this lively din, there was an unsettling undercurrent, whispering tales of neglect and disillusionment, as if the city's vibrancy masked the shadows lurking just beyond the gleaming lights."

In this excerpt, the author's word choices contribute significantly to the atmosphere. Which of the following words best captures the contrasting themes presented in the passage?