What can contribute to environmentally-friendly driving?

Your answer is fully correct because all three options contribute to environmentally-friendly driving according to German traffic rules. Attending practical training for fuel-efficient driving helps you learn techniques that reduce fuel consumption and emissions. Using vehicles with electric drives minimizes pollution since they produce no direct exhaust gases. Forming car pools decreases the number of vehicles on the road, reducing overall traffic emissions. Combining these measures supports sustainable mobility and environmental protection.