The world’s population is concentrated in certain countries like china most likely because of
there being endemic diseases in the country.
the lack of availability or lack of use of contraceptives.
the emigration of people from more populated countries.
the country’s land mass, which is much larger.

The correct answer is B) the lack of availability or lack of use of contraceptives.

The world’s population is concentrated in certain countries like China most likely because of the lack of availability or lack of use of contraceptives.

There are many countries, most of the underdeveloped countries, that lack of a sexual education program in school. The government also does not have sexual education campaigns for families and many people do not use a contraceptive or condom to control natality. That is why certain countries have overpopulation in their territories. That is the case of China or India.  

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.

treaties

explanation: