How did geography contribute to the rise of ghana, mali ,and songhai

Explanation:  Geography contributed greatly to the emergence of these three countries because the sources of salt and gold deposits were abundant, which ultimately favored the creation of navigation and trade routes to facilitate the traffic of the precious metal and the saline resource, which They were the main sources of wealth of these empires.

the enslaved people onboard suffered from illness with some frequency

c. troops marched forward in close formation against newer, more accurate weapons