The Gulf Coast region of the U.S. is the area limited by the shoreline of the coastal states of United States, being those Texas, Louisiana, Mississipi Alabama and Florida. This Gulf Coast on the Gulf of Mexico is characterized for its tendecy to be hit by hurricanes and this is the reason for having permanent floods and thunderstorms.
Forthis reason, it is reasonable to conclude that the soil is not quite ideal for agriculture as in other areas, so the correct answer to this question is D.Repeated flooding. Absence of irrigation is not quite the case since there are many sources of water in this region, as well as there is plenty of animal life, which does not interfere with agriculture, and finally, this territory has been populated for many native tribes and later from European settlers, so the other options are not really a reasonable choice.