Answer:
1. Traders overcame many environmental obstacles to trade many goods across the Sahara Desert.
2. Donkey
Explanation:
Looking at the image presented in the question, the statement that best exemplifies the Mali trade network is "Traders overcame many environmental obstacles to trade many goods across the Sahara Desert."
The image showed that despite the environmental challenges, there are extensive trades among the various countries in the Sahara desert involving different routes to different locations.
Also, from the image, it can be concluded that the animal that was most commonly used to conduct trade in sub-Saharan Africa is "Donkey."
