Question: Why do many people in big cities not know their neighbors?
Analysis

1.When answering this question, consider the lifestyle and social dynamics of big cities. People in urban areas often lead busy lives, with demanding work schedules and long commutes, leaving them with little time or energy to interact with neighbors. 2.The design of modern urban living spaces, such as high-rise apartments, can also contribute to a sense of isolation, as people may not have common areas to meet and socialize. Additionally, the transient nature of city living, with people frequently moving in and out, can make it difficult to establish long-term relationships with neighbors.

Synonyms
Try these synonyms instead of repeating the question:
  1. big citiesmetropolitan areas
  2. knowbe acquainted with