In the given diagram, ovals are marked at different heights $(h)$ of a hill. Which one of the following options $\mathbf{P}, \mathbf{Q}, \mathbf{R}$, and $\mathbf{S}$ depicts the top view of the hill?
- $\mathbf{P}$
- $\mathbf{Q}$
- $\mathbf{R}$
- $\mathbf{S}$