Which of the following is a tip for improving fuel efficiency?

Avoiding sudden stops and turns is key to improving fuel efficiency because sudden changes in speed and direction can consume more fuel. When a driver accelerates rapidly or brakes hard, the vehicle expends extra energy to overcome inertia, leading to increased fuel consumption. Smooth driving and gradual acceleration help maintain a more consistent speed, which is generally more fuel-efficient.

In terms of the other suggestions, reducing tire pressure would actually lead to decreased fuel efficiency, as under-inflated tires create more rolling resistance. Increased use of air conditioning can also lower fuel efficiency, as the engine has to work harder to power the AC system. Lastly, minimizing trips by combining errands is a strategy aimed at reducing overall travel distance and frequency, which isn’t directly related to driving behavior during trips but is still a good practice for better fuel economy.