Which would most likely not be a result of rapid population growth in a region?
a. decrease in food availability and increased reliance on imported food
b. increase in taxes and debt with foreign countries
c. increase in the rate of plant and animal extinction
d. expansion of natural environments such as forest land***

If this question regards the rapid population growth of HUMANS in a region, then I believe the most plausible answer would be D.

It is highly unlikely that natural environments such as forest land would be expanded, in actuality this land area would decrease, as a result of people building and developing on these areas. This is due to more room being needed as a result of the sudden rise in population.