Which items were traded in the markets of East Africa?

Traders on the eastern coast of Africa, many of them blacks, profited from a rise in trade with Asia, and from India the Africans imported silks, cottons and glassware. From the 1100s, Arabs began arriving in greater number in this coastal area. In the 1200s Mombasa became staunchly Muslim, and a Muslim dynasty was established at Kilwa.

Explanation:

they encountered severe weather for which they were poorly prepared.

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