Final answer:
In an automatic transmission, the 'Drive' (D) gear should be selected when you want to move forward.
Step-by-step explanation:
In an automatic transmission, you don't manually select gears like in a manual transmission. Instead, the transmission system automatically chooses the appropriate gear based on the speed and load conditions of the vehicle. However, understanding how an automatic transmission works can help clarify this.
An automatic transmission typically has multiple gears, such as Drive (D), Reverse (R), Neutral (N), and Park (P). When you want to move forward, you should select the 'Drive' gear (D) by shifting the transmission lever to that position. This gear allows the vehicle to move forward. The specific gear ratios and how the transmission shifts up and down are controlled by the transmission's internal components.