Final answer:
The author contends that Portugal's success in Asia was due to a combination of the distraction of Asian powers, technological advancements in navigation, strategic alliances, exploitation of local rivalries, and military superiority granted by gunpowder weapons.
Step-by-step explanation:
Portugal's success in Asia during the age of exploration can be attributed to a unique set of circumstances and strategic approaches. The author argues that Portuguese exploration thrived due to the preoccupations of Asian powers with their own continental issues, which left an opening for Portugal's aggressive naval strategies. The expansion of Portuguese trade was furthered by advancements in navigation technologies such as the compass, the astrolabe, and the caravel. Moreover, Portugal's utilization of local rivalries and alliances with regional powers aided in establishing their dominance. The use of advanced gunpowder weaponry, particularly in naval confrontations, also played a significant role in asserting Portuguese military strength in the Indian Ocean.