Which energy sources are described as Alternative Energy Sources?

• A. Wind, Solar, and Water Energy
• B. Coal and Oil
• C. Nuclear and Geothermal
• D. Solar and Nuclear

Answer: (A)

Alternative energy sources are options that come from renewable resources and help reduce reliance on fossil fuels. Wind, solar, and hydro power are classic examples because they rely on natural processes—air movement, sunlight, and flowing water—and produce little or no greenhouse gas emissions during operation. Wind turbines capture kinetic energy from moving air, solar panels convert sunlight into electricity, and hydroelectric systems use the momentum of flowing water to generate power. Coal and oil are fossil fuels, so they don’t fit this category. Nuclear and geothermal can be considered low- or zero-emission in operation, but nuclear is often debated as an “alternative energy” label and is less consistently categorized with renewables; some curricula treat geothermal as renewable, yet combining it with nuclear makes that option less clearly aligned. Solar paired with nuclear includes a controversial inclusion, since nuclear isn’t typically labeled as an alternative energy source in many contexts. So the best fit is wind, solar, and hydro power.