When driving a manual vehicle, what is essential to do while on an incline?

Using first gear to start moving when driving a manual vehicle on an incline is essential for several reasons. First, first gear provides the necessary torque to get the vehicle moving uphill, making it easier to accelerate from a stop without rolling backward. This is particularly important on an incline where gravity is working against the vehicle's movement.

Additionally, engaging first gear helps ensure that the driver has better control over the vehicle during the initial start. It allows for a gradual buildup of power and momentum, which is critical in preventing the vehicle from stalling or losing traction on the slope.

While employing other techniques, like using the parking brake or being in neutral, may seem like alternatives, they do not provide the same level of control or effective starting capability when faced with an incline. Hence, selecting first gear during this scenario is the best practice for safe vehicle operation.