To order the activities from greatest to least impact in reducing fossil fuel consumption, we can analyze the options based on their environmental impact:
- Walk to work - This has the greatest impact since it eliminates fossil fuel consumption entirely.
- Carpool to work - This reduces the number of vehicles on the road, which decreases overall fossil fuel consumption compared to driving alone.
- Drive an electric car to work - While electric cars reduce dependency on fossil fuels compared to gas-powered cars, there may still be some environmental impact depending on how the electricity is generated.
- Drive alone to work - This has the least impact since it contributes to higher fossil fuel consumption.
Based on this analysis, the order from greatest to least impact would be:
- Walk to work
- Carpool to work
- Drive an electric car to work
- Drive alone to work
So the best option in your provided choices is Walk to work, carpool to work, drive an electric car to work, drive alone to work.
However, since "Walk to work" is not explicitly listed in the options you provided, I would then arrange the available choices accordingly:
- Carpool to work - Greater impact than driving alone.
- Drive an electric car to work - Less impact than carpooling but better than driving a gas car alone.
- Drive alone to work - Least impact as it leads to more fuel consumption.
Thus, considering the given options and focusing on the ones explicitly stated, the ranking would be:
- Carpool to work
- Drive an electric car to work
- Drive alone to work
Note: The orders provided in the options need clarity; for instance, the direct impact of walking isn't represented. Therefore, choose based on the context found in your question.