Compare and contrast, as the exam questions sez:

and

…The tribal people of the Omo Valley keep cattle, sheep and goats but their unique pastoral way of life is sadly threatened by the modern world and the march of development.
A hydroelectric dam, known as Gibe III, is planned to be constructed across the Omo River Valley and according to Survival International this will cause the threatened end to the way of life of some 200,000 Ethiopian tribal people.
Survival International’s director, Stephen Corry, is quoted on the organisation’s site as saying: “The Gibe III dam will be a disaster of cataclysmic proportions for the tribes of the Omo valley. Their land and livelihoods will be destroyed, yet few have any idea what lies ahead. The government has violated Ethiopia’s constitution and international law in the procurement process. No respectable outside body should be funding this atrocious project.” (from http://bardofely.hubpages.com/hub/The-amazing-body-art-of-the-Ethiopian-Omo-tribes)