Mansa Musa is particularly remembered for which of the following contributions?

Mansa Musa is particularly recognized for strengthening trade routes, especially during his reign over the Mali Empire in the 14th century. He played a significant role in enhancing the trans-Saharan trade, connecting the gold-rich regions of West Africa with North Africa and beyond. This was exemplified by his famous pilgrimage to Mecca in 1324, which not only showcased his immense wealth but also demonstrated the importance of the trade network that allowed for the flow of goods such as gold, salt, and textiles across the Sahara Desert.

His pilgrimage brought attention to Mali and established it as a center of wealth and education, contributing to the spread of Islam and the growth of cities like Timbuktu, which became a significant trade and cultural hub. The development and support of these trade routes facilitated economic prosperity and cultural exchange throughout the region, solidifying Mansa Musa's legacy as a powerful and influential ruler in West African history.

The other choices do not pertain to Mansa Musa's contributions. For example, the Great Wall of China, the Silk Road, and the Byzantine Empire are historical elements associated with other regions and civilizations.