What impact did islam have on west africa?

Between 1000 and 1700, islam caused west Africa to experience an increase in trade and economic activities, the rise and fall of several Islamic states and empires, and provided new practices tobe blended with traditional African culture

the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

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sorry i do not know this