The question is about the data from the UN-Habitat`s Global Report on Human Settlements 2009, focusing on the region with the fastest growth in urbanization in the last three decades.

Option 1, Asia, is identified as the correct answer. This is because in the past few decades, Asia has been growing at an unprecedented pace, characterized by rapid population growth and extensive urban development. Many cities in Asia have emerged as global economic, technological, and cultural hubs which results in high urbanization rate.

Option 2, Europe, has not observed such a significant rate of urban growth in the given period. The urbanization process in Europe is more gradual and controlled because it was industrialized earlier.

Option 3, Latin America and Caribbean, while it saw significant urban growth, did not outpace Asia.

Option 4, North America, is mostly urbanized already, thus the rate of urban growth in the last three decades was not as dramatic as in Asia.

Overall, due historical and socio-economic factors, Asia has experienced the fastest urban growth.