Tarah is part of a mass.
Option d
Explanation:
To be part of the mass means to be part of the group of people who behave in a similar way without any coordination while maintaining individuality. Tarah is at the concert with many people who could be singing along with the artist or dancing.
These behavior is common among all the concert attendees and they do it without coordination or any practice whatsoever. Another definition is that while there is common behavior portrayed by the participant, the activity doesn’t have to take occur at the same place or time.
