Final answer:
For normal forward driving conditions, the correct gear is 'Drive' which allows the car to accelerate and move forward using the appropriate gear ratios selected automatically by the transmission.
Step-by-step explanation:
The correct gear for normal forward driving conditions is Drive (often marked as 'D' on the gear selector). When a car is in Drive, the transmission will automatically select the appropriate gear ratio for the speed and acceleration that you're commanding with the gas pedal. Choosing Drive allows the vehicle to move forward and is generally used for most driving scenarios. It is not Reverse (used for going backward), Park (used when the vehicle is stationary to prevent it from rolling), or Neutral (which disengages the engine from the wheels, allowing the car to coast without power).