A busy city is characterized by a high population density and a constant flow of activity. Streets are often filled with vehicles, including cars, buses, and bicycles, while pedestrians navigate sidewalks. Skyscrapers and commercial buildings dominate the skyline, housing offices, shops, and restaurants. Public transportation, such as subways and trains, plays a crucial role in helping residents and visitors move around efficiently. The vibrant atmosphere is enhanced by the sounds of traffic, street vendors, and public events, making a busy city a hub of culture and commerce.