Hydrostatic Pressure Formula

Steps:

• Recall hydrostatic pressure formula: P = ρ g h, where ρ is density, g is gravity, h is depth.
• Note pressure P increases directly with density ρ.
• Note pressure P increases directly with depth h.
• Identify option where both ρ and h increase to raise P.

Why D is correct:

• Per P = ρ g h, increasing both depth (h) and density (ρ) directly increases pressure.

Why the others are wrong:

• A: Depth decrease reduces P, offsetting density increase.
• B: Both depth and density decreases reduce P.
• C: Density decrease reduces P, despite depth increase.

Final answer: D