Which situation results in a final value of zero?

the overall change in temperature when the temperature goes from -10°F to 10°F

the total profit made when a person buys an item for $3 and then sells the item for $3

the overall change in altitude of a hot air balloon after rising 21 kilometers from sea level

the total distance a person travels when he bikes 5 miles to school and then bikes 5 miles back home