Which of the following are characteristics of most large cities? They

I. have large populations
II. are administrative centers
III. are religious centers
IV. are commercial centers

The industrial belt of Japan produces

Cities of high population densities develop on plains because

I. act as climate barriers
II. have fertile soils
III. lack heavy rainfall
IV. have terrain with ease oof communication

A notable problem of air transportation in tropical Africa is

Wich of the following is most affected by drought and flood