The coastal location of Axum significantly contributed to its significance as a trading hub primarily by providing strategic advantages for maritime trade. This geographic positioning allowed Axum to facilitate trade between various regions, including the Indian Ocean, Arabian Peninsula, and parts of Africa. With access to the coast, Axum could engage in maritime activities, importing goods such as spices, silk, and textiles while exporting ivory, gold, and other commodities.
The proximity to the sea enabled the establishment of trade routes that connected Axum with major trading networks, enhancing its commercial activities and economic power. Thus, the correct answer is that Axum's coastal location provided strategic advantages for maritime trade, enabling it to flourish as a vital trading hub in the ancient world.