Concept:An efficient city transport network must connect different travel modes so that movement is smooth, fast, and affordable.
Explanation:Air transport is very expensive and is not suitable for regular travel inside a city.
Feeder roads only improve access to nearby areas and do not reduce traffic problems on major routes.
Speed boats and ships are useful only in coastal or riverine locations, not for general city commuting.
A combined system using buses, trains, metro rail, and well-planned roads can carry more people comfortably.
Integrating all modes helps passengers switch easily from one form of transport to another.
This reduces congestion on roads and makes daily travel quicker and more reliable.
Therefore, a fully integrated transport system is the best answer for a cosmopolitan city.
Answer:D. integrated transport system involving all modes