Joe, a hiker, stands at the top of a hill on a trail above the ocean. Joe's friend Dave is just starting out at the trailhead, which is at the beach.Which statement about this scenario is accurate?

Air pressure decreases as altitude increases because there is less air above you pressing down. Since Joe is already above the beach, going farther uphill would make the air pressure continue to decrease. The air at Joe’s higher elevation is also less dense than the air Dave breathes at sea level, so choices A and D are incorrect.

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