Answer:1. Block a river flow: C. Hydrothermal energy (Hydrothermal power plants often require dams, which block river flow.)2. It is clean and renewable: E. All of the above (Wind, solar, hydrothermal, and geothermal are all considered clean and renewable energy sources.)3. No monthly electricity bills: E. All of the above (These are renewable energy sources, so you wouldn't have to pay monthly bills for electricity if you generate your own power from them.)4. Emits sulfur dioxide and silica: D. Geothermal energy (Geothermal power plants can release sulfur dioxide and silica into the atmosphere.)5. A drought could potentially affect its function: C. Hydrothermal energy (Hydrothermal power plants rely on water flow, so droughts could reduce their effectiveness.)6. The turbine can be a threat to wildlife (e.g. birds, bats): A. Wind energy (Wind turbines can pose a risk to birds and bats that fly into them.)7. Weather dependent: A. Wind energy and B. Solar energy (Wind energy depends on wind speed, and solar energy depends on sunlight availability.)8. Good domestic potentials: E. All of the above (All these energy sources have good potential for domestic use, particularly solar and wind for residential applications.)9. No fuel required to operate: E. All of the above (These energy sources derive their power from natural sources and don't require fossil fuels.)10. Construction and materials are expensive: E. All of the above (The initial construction costs of renewable energy systems can be high compared to traditional fossil fuel power plants.)