You can download the full PDF file at the beginning of this description. Key and important questions from the document: 1. Ecological Pyramids and Invasive Species – Identifying trophic levels in a grassland biome, explaining pyramid structure, and assessing impacts of invasive species like fire ants. 2. Water Cycle and Urbanization – Explaining the role of plants in transpiration and surface runoff, and analyzing urbanization’s effects on the water cycle. 3. Population Demographics and Migration – Calculating dependency ratios for Germany and Nigeria, explaining migration factors, and proposing strategies for managing population change. 4. Antarctic Ice and Environmental Protection – Analyzing trends in Antarctic sea ice, discussing causes of change, and evaluating the effectiveness of the Antarctic Treaty. 5. Energy Resources and Security – Identifying renewable and non-renewable energy sources, defining energy security, and explaining causes of energy insecurity. 6. Waste Management and Food Security – Evaluating the effectiveness of reduce, reuse, recycle strategies for waste disposal, and analyzing food security strategies in a chosen country.