What does each stage of the index of economic development represent or illustrate

Unlike the stages of economic growth (which were proposed in 1960 by economist Walt Rostow as five basic stages: traditional society, preconditions for take-off, take-off, drive to maturity, and age of high mass consumption), there exists no clear definition for the stages of economic development.

within these regions are all the major types of biomes in the world. a biome is a community of animals and plants spreading over an extensive area with a relatively uniform climate. some diverse biomes represented in north america include desert, grassland, tundra, and coral reefs.