A number of factors may help account for the difference in biodiversity between low and high latitudes. A. Though land area may be related to a region's biodiversity, it is not a primary determining factor B. Regions possessing conditions that are favorable for plant growth tend to have abundant and diverse vegetation that supports a large number of species. C. A structure of varying heights is found in both tropical and temperate forests. D. The difference in microclimate between a ground-level canopy and an upper-level canopy is responsible for the number of species that inhabit each canopy. E. The more complex the structure of the vegetation of a region, the more species it is able to support. F. The temperature range of a region determines the number of animals that feed, move around, shelter themselves, live, and breed in that region.