Final answer:
The expansion of maritime trade in the Indian Ocean Basin and the expansion of trade over the land routes of the Silk Roads were interconnected. Trade routes were not independent, as they were linked through the exchange of goods and ideas between different regions.
Step-by-step explanation:
The expansion of maritime trade in the Indian Ocean Basin and the expansion of trade over the land routes of the Silk Roads were interconnected during the period of 1200-1450. Trade routes were not independent, as they were linked through the exchange of goods and ideas between different regions. For example, Muslim sailors dominated the Indian Ocean trade and connected East Africa to China and beyond. Similarly, the Silk Roads facilitated the spread of Buddhism from India to China and onward.
Therefore, the relationship between the expansion of maritime trade in the Indian Ocean Basin and the expansion of trade over the land routes of the Silk Roads was the interconnectedness of trade routes.