Final answer:
The integer that represents being 5 feet below sea level is -5, as negative integers are used to indicate distances below a reference point like sea level.
Step-by-step explanation:
To write an integer for the situation of being 5 feet below sea level, we need to represent this as a negative number because integers below sea level are considered to be in the negative direction relative to sea level, which is treated as the zero point or origin.
-5 would be the integer that represents being 5 feet below sea level. When dealing with measurements above and below a reference point such as sea level, positive integers represent distances above sea level and negative integers represent distances below sea level.