Question

The frigid zone densely populated what is the reason

Answer 1

due to the cold and adverse conditions and there is do much cold that people cannot survive. there do much time but the people who have adjusted them there r living and there homes r made known as igloos and the inner portion of the house is covered with the thick skin of seal

Answer 2

The northern plains have vast level land. ... ii These plains have high population density as a result of which we find dense railway network these to cater the interest of the people. iii Rich agricultural resources provide a favourable condition for the growth of railway network in the northern plains.