Which Situation describes opposite quantum’s that when combined would equal 0?

A plane ascends 15,000 feet and then ascends 15,000 feet. How many feet above the ground is the plane?
A plane ascends to 10,000 feet and then ascends 15,000 feet. How many feet above the ground is the plane?
A plane ascends to 15,000 feet and then descends 15,000 feet. How many feet above the ground is the plane.
A plane ascends 15,000 feet and then descends 10,000 feet how many feet above the ground is the plane

The situation that describes opposite quantities that when combined would equal 0 is:

A plane ascends to 15,000 feet and then descends 15,000 feet. The plane would be at the same height as the ground level.

The situation that describes opposite quantities that, when combined, would equal 0 is when a plane ascends a certain distance and then descends the same distance.

In the given options:
1. A plane ascends 15,000 feet and then ascends 15,000 feet: In this scenario, the plane would be 30,000 feet above the ground.
2. A plane ascends to 10,000 feet and then ascends 15,000 feet: In this scenario, the plane would be 25,000 feet above the ground.
3. A plane ascends to 15,000 feet and then descends 15,000 feet: In this scenario, the plane would be at the same altitude as the ground, 0 feet above the ground.
4. A plane ascends 15,000 feet and then descends 10,000 feet: In this scenario, the plane would be 5,000 feet above the ground.