Answer:
the population of Florida
Step-by-step explanation:
A value that varies means a value that shall change over a period of time.
Accordingly when we talk about population the population shall increase or decrease with time, as this the natural thing that new babies are born and at the same time people also die.
Even in Florida there will be new babies who are born and also there shall be people who might be dying. Accordingly the population count keeps on changing.
The flight time depends upon the aerial distance and the speed which generally remains same.
Accordingly if a flight takes hours to travel the distance it will be same.
The area of a particular place shall not change as earth will not create new land, or the area will remain same by any how only exception to this is acquisition of land of neighbouring places, by war or political influence, but not in a natural manner.
Thus, population of Florida is variable.