one difference in the demographic effects of trade on the silk road and trade in the ( Trans ) Sahara desert

The Trans-Saharan trade route initially connected West and East Africa. Later, it helped to introduce Eurasian goods to Sub-Saharan Africa (the portion of Africa beneath the Sahara desert). Goods from West Africa, like copper, salt, and gold, also made their way to Eurasia via this trade route.

Explanation:

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.