Which is one preventative measure for avoiding engine overheating?

Regularly checking and maintaining proper coolant levels is crucial for preventing engine overheating. The engine cooling system relies on coolant to absorb heat generated during combustion and then dissipate it through the radiator. If the coolant level is too low, there may not be enough fluid to effectively transfer heat away from the engine, leading to increased temperatures and potential overheating. Maintaining the correct coolant level also helps to ensure that the coolant mixture has the right antifreeze properties, further protecting against corrosion and maintaining optimal functioning under high temperatures.

Other options, while potentially beneficial in different contexts, do not specifically address the critical function of coolant in regulating engine temperature.