You just discovered a nomadic people who have lived in the desert their whole lives. their language contains over 20 words to describe the various types and textures of sand contained in their environment. according to research on linguistic determinism, what is the likely origin for all of these terms

We cannot determine for sure what the origin for these terms might be. The terms may have been influenced by their environment - this nomadic people may have created an entire language based on the environment they were surrounded by. Or conversely, they may have created their language first and then changed their perception of the environment after that. Ultimately, we cannot know that. 

It would be around the egyptian area.