Final answer:
The growing wealth of port cities in South Asia is a result of advancements in maritime technology and knowledge, a lack in agricultural diversity, and a demographic shift in urban areas.
Step-by-step explanation:
The growing wealth of port cities in South Asia is a result of advancements in maritime technology and knowledge, a lack in agricultural diversity, and a demographic shift in urban areas.
Advancements in maritime technology and knowledge, such as improvements in shipbuilding and textile manufacturing, stimulated coastal trade in South Asia. These advancements allowed port cities to have better access to global markets and enhance their manufacturing and industrial base.
Furthermore, the lack of agricultural diversity in rural areas forced a large number of people to migrate to urban centers in search of better job opportunities. This demographic shift resulted in the rapid growth of urban areas and increased the interaction of South Asia with the global economy.