Which of the following is important to check before a long trip?

Checking vehicle fluid levels and tire pressure before a long trip is crucial for several reasons. Proper fluid levels—such as engine oil, coolant, brake fluid, and windshield wiper fluid—ensure that the vehicle operates smoothly and safely. Low fluid levels can lead to overheating, mechanical failure, or reduced visibility due to inadequate wiper performance.

Similarly, tire pressure is essential for safe driving. Properly inflated tires contribute to better fuel efficiency, improved handling, and reduced risk of tire blowouts. Under-inflated or over-inflated tires can cause increased wear and tear, negatively affecting the vehicle's performance and safety.

Prioritizing these checks helps prevent breakdowns, ensures optimal vehicle performance, and enhances overall safety on the road, making it a fundamental part of trip preparation. Other options, while they may enhance the trip experience, do not have the same critical impact on safety and vehicle functionality.