Correct Response: C. About 75% of the world's population lives in the mid-latitude climates located between 20° and 60° north latitude. Within this region, people are more likely to congregate in relatively warm lowland areas than in colder upland areas. Low temperatures and short growing seasons limit the habitability of cold high- latitude climates (A), as does the lack of water in dry low-latitude climates (D). Compared with warm mid- latitude climates, humid low-latitude climates (B) are much less densely inhabited.