The leader of the workers was carrying out a blue pendon with the words "In honor of the Elm street school".
Explanation:
In the short novel A Long Walk to Water written by the author Linda Sue Park published in 2010 the story based in real facts from different times, narrates the hard lives of a young girl Nya who has to go through really hard situations in Sudan at the age of 11 years old. And on the other side of the story it is possible to find Salva Dut a guy who also has to live a hard life out of his parents and who some years later creates the organization "Water for South Sudan" to help others find water. Salva is the one who takes with him the pendom "In honor of the Elm street school".
The one that is an example of a social barrier to cultural diffusion is : Laws that prohibit western-style clothing This will prevent a lot of western people to enter that specific region because they're afraid to get into trouble