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### Key Questions:
- Hydrology and Fluvial Geomorphology | Water Flow and Human Impact: Effects of drainage density on hydrographs, the role of soils and vegetation in drainage basins, and human activities leading to reduced water flow.

- Atmosphere and Weather | Precipitation and Climate Change: Atmospheric moisture processes, formation of precipitation, global wind patterns, and the extent of climate change due to global warming.

- Rocks and Weathering | Plate Movements and Slope Stability: Formation of mountain ranges and island arcs, influence of climate on rock weathering, and human impact on slope stability.

- Population and Migration | Growth and Urbanization: Relationship between natural increase and urban population, effects of high fertility rates, and factors influencing intra-urban migration.

- Settlement Dynamics | Urban Growth and Challenges: Causes and consequences of world city growth, advantages and disadvantages of urbanization, and challenges in reducing urbanization in LEDCs.

- Economic and Social Development | Life Expectancy and Government Role: Benefits and problems of increased life expectancy in LEDCs and the extent to which governments can control migration.