Step 1: Concept
Hydrostatic pressure $P$ at depth $h$ is given by $P = P_0 + \rho gh$.
Step 2: Meaning
$\rho$ is the density, $g$ is gravity, and $h$ is the depth from the surface.
Step 3: Analysis
Since $P$ is directly proportional to $h$, as depth increases, pressure must increase.
Step 4: Conclusion
Pressure increases with depth.
Final Answer: (B)