Which of the following factors has led to a lot of Southeast Asian cites developing?

1.Trade Routes
2. Mountain Exploration
3. Imperialism from outside countries
4. Desert development

1. Trade Routes

Trade routes have played a significant role in the development of Southeast Asian cities. The region has historically been a major hub for trade due to its strategic location between major trading routes connecting the Indian Ocean and the South China Sea. This has attracted merchants and traders from around the world, leading to the growth and development of cities within the region, such as Singapore, Bangkok, and Kuala Lumpur.