If a district has zero natural increase but high international emigration, what kind of effect can appear at the national level?

Correct answer: Pressure for a decline in the national population may occur

Answer: A. Natural increase is zero when births and deaths are equal. International emigration means residents leave the country for another country. At the national scale, such out-migration reduces the number of people counted in the country, unless it is offset by immigration or another component of growth. Therefore, high international emigration can create pressure toward a decline in the national population. Option B is wrong because increase is not guaranteed. Option C confuses internal migration with international migration: movement within a country changes regional distribution but not the national total, whereas international movement can change the national total. Option D is unsupported because emigration does not automatically raise birth rates. Memory cue: always identify the scale—internal migration redistributes, international migration can change the national total.