May someone please help me in my english?

Question

please check the line bellow for any mistakes.thanks in advance

South part of this Land is the second geographical area of that, in respect to population.

Answer 1

The southern part of the land is the second geographical area, with respect to population.

Answer 2

The southern region is the geographical area with the second highest rate of population.

Answer 3

In respect to population, the Southern region has the second greatest amount of people in the country.

Answer 4

The South is the second geographical area, in terms of population, in this country.