Driving in snowy conditions requires special precautions due to the **reduced tire grip** on the road. This means that the vehicle can skid more easily and needs more space to brake.

- When starting on a snowy road, it is important to choose an **appropriate gear speed**. Second gear is ideal because it allows the vehicle to start with more speed but with **less engine force**, reducing the risk of the wheels skidding.

- Additionally, it is crucial to **accelerate smoothly**. This helps maintain control of the vehicle and avoids sudden movements that could cause the wheels to lose traction.

- In contrast, using first gear and accelerating fully can cause the wheels to spin too quickly, increasing the risk of skidding. Using fourth gear and accelerating fully is even more inappropriate, as the engine will not have enough force to move the vehicle in a controlled manner on slippery conditions.

Therefore, the best way to start moving again on a snowy road is by **engaging second gear and accelerating smoothly**.