The table here shows information about four different populations of a flowering plant species. The relative population sizes, level of genetic variation, and presence of selective pressures are indicated in the table. Analyze the data and evaluate in which population is natural selection most likely to cause a shift in the alleles and phenotypes? Population, Pop. Size, Genetic variation, Selective Pressures

I , Small, Low, High
II, Small, High, Low
III, Large, Low, High
IV, Large, High, High