CASE STUDY: The throat for the Gahel Sahel la en Arabe word that inearis "coestine The Sanel is the sem dry besition zone between the Sahara desert and Africa's tropical grassland and savanna is a region thal 1000km wate dobeto er 4000am from Seoul until Sudan (Some scientists include Erares es part of the Sahell Dry land vyse on with the answer the following questions MAURITANIA ALGERIA NIGERIA GAME BORN Map of the Sahel in North Ahica The climate in two Sahel region is dry tor at best oight months of the year, with a short rainy season between June and Augual. The rainte 200-400mm per year, but it is unpredictable Droogtes occur twice i) every Dve years in the region Several inhabitants is sand-nomadi they plant crops, but they sao move around in search of pasturage for the annala 3.1.1 Define the following terms: cm/month 1900 1910 1920 1950 1940 1950 1960 1970 1980 1390 200X a) Desertification b) Drought (2x2)(4) 3.1.2 Use the information in the text and call one physical and one human factor threaten the Sahel. (2x1)(2) 3.1.3 Use data rainfall index data and briefly explain the rainfall situation from 1970 to 2010. (2x2)(4) 3.1.4 Explain TWO negative economic effects of droughts. (2x2)(4) TOTAL: 60​