A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region. Contour lines are shown at $25$ m intervals in this plot.
Which of the following is the steepest path leaving from $P$?
- $\text{P to Q}$
- $\text{P to R}$
- $\text{P to S}$
- $\text{P to T}$