Final answer:
Mali was founded by Mansa Musa and he introduced the Islamic culture during his pilgrimage to Mecca.
Step-by-step explanation:
The correct answer is (a) Mansa Musa; Ibn Battuta. Mansa Musa was the founder of Mali. He is known for his pilgrimage to Mecca, during which he spread Islamic culture and attracted the attention of the Muslim geographer Ibn Battuta. Ibn Battuta's account of his visit to Mali is a major source of knowledge about fourteenth-century Mali.