Helene, a hiker, starts at an elevation of 27 feet above sea level and descends 32 feet during her hike to base camp. Which describes the elevation of base camp?

To find the elevation of base camp, we start with Helene's initial elevation of 27 feet above sea level and then subtract the 32 feet she descends.

Initial elevation: 27 feet above sea level
Descent: 32 feet

So, we calculate:

27 feet - 32 feet = -5 feet

This means base camp is 5 feet below sea level.

Thus, the correct response is:

**5 feet below sea level.**