the world’s population is concentrated in certain countries like china most likely because of \nthere being…

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

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

Answer

Brief Explanations:

  • Option 1: Endemic diseases would likely reduce population, not concentrate it, so this is incorrect.
  • Option 2: Lack of contraceptives can lead to higher birth rates, contributing to population concentration. This is a plausible reason.
  • Option 3: Emigration from more populated countries would decrease their population, not explain concentration, so incorrect.
  • Option 4: A larger land mass alone doesn't guarantee population concentration (e.g., some large countries have low population density). So this is incorrect.

Answer: B. the lack of availability or lack of use of contraceptives.