Latin America

1. the second longest river in the world, and one of south america's three major river system
3. a factor that causes people to leave to leave their home and migrate to another region
7. a savanna that has flat terrain and moderate rainfall, which make it suitable for farming
8. a factor that draws or attracts people from another region
9. a river in central south america and one of its three major river systems, originating in the highlands of southern brazil
11. a large, grassy, treeless area in South America, used for grazing and farming
12. a river mainly in Venezuela and part of South America's northernmost river system

2. a basic support system needed to keep an economy going
3. a vast area of grassland and rich soil in south-central South America
4. a forest region located in the tropical zone with a heavy concentration of different species of broadleaf trees
5. a way of clearing field for planting by cutting trees, brush and grasses and burning them
6. an ancient technique for growing crops on hillsides and mountain slopes, using step like horizontal fields cut into the slopes
10. a large system of mountain ranges located along the pacific coast of central and south america