Can y’all please help ASAP.
A fish is located 5 feet below sea level.
A bird is flying 10 feet above sea level.
A shark is swimming at 18 feet below sea level.
A balloon is floating at 7 feet above sea level.

What is the furthest from sea level (zero)?

Can yall please help ASAP A fish is located 5 feet below sea level A bird is flying 10 feet above sea level A shark is swimming at 18 feet below sea level A bal class=