What should passengers do when the motorcycle is turning or going into a curve?

When a motorcycle is turning or going into a curve, it is important for passengers to look in the direction of the turn. This helps them maintain balance and stability on the motorcycle, as well as assists the rider in making the turn smoothly. Looking over their shoulder in the direction of the turn allows the passenger to better anticipate the motorcycle's movements, as their body will instinctively shift with the motorcycle’s lean, resulting in a more coordinated response to the dynamics of the turn.

In contrast, other options such as closing their eyes would obviously be dangerous, as it removes the passenger's awareness of their surroundings and any potential hazards. Looking straight ahead does not provide the necessary visual input to aid in balance during a turn, while simply relaxing and holding on might not fully prepare the passenger for the shifts in weight and balance that occur during turns.