Final answer:
The elevation closest to sea level is -50 feet as it has the smallest absolute value among the options listed.
Step-by-step explanation:
The elevation that is closest to sea level is the one with the smallest absolute value, as elevations below sea level are indicated by negative numbers. Here are the elevations listed again for clarity:
- A. -50 feet
- B. -68 feet
- C. -77 feet
- D. -86 feet
- E. -97 feet
Among these, the elevation -50 feet is the closest to sea level because it has the smallest absolute value. The negative sign indicates that it is below sea level, and the smaller the number, the closer it is to zero, which represents sea level.