The typical life cycle of a neighborhood can be extended or shortened by changes in which factors?

The correct answer is focused on economic factors because they play a vital role in influencing the life cycle of a neighborhood. The economic environment includes aspects such as job availability, income levels, and the overall financial health of the community. When the local economy thrives, it can lead to increased property values, revitalization efforts, and an influx of new residents or businesses, thereby extending the neighborhood's life cycle. Conversely, a downturn in the economy can lead to declining property values, increased vacancy rates, and reduced investment in the area, which can shorten the life cycle.

While environmental, social, and political factors do indeed impact neighborhoods, they often do so in conjunction with economic realities. For instance, environmental changes might affect the desirability of an area, social dynamics can influence community cohesion, and political decisions can affect zoning laws and funding. However, economic changes are often the catalyst for how these other factors manifest in a neighborhood's life cycle, making them the most significant influence in this context.