Hydrostatic pressure increases with density and depth

Steps:

• Recall the formula for hydrostatic pressure: P = ρgh, where ρ is density, g is gravity (constant), and h is depth.
• Compare pressures by calculating or ranking ρ × h for each option, since g is the same.
• For A: 1000 × 4 = 4000
• For B: 1000 × 10 = 10,000
• For C: 1200 × 4 = 4800
• For D: 1200 × 10 = 12,000 (highest product)

Why D is correct:

• D has the maximum ρ × h value, so P = ρgh is greatest per the hydrostatic pressure formula.

Why the others are wrong:

• A: Lowest ρ × h due to low density and shallow depth.
• B: Higher depth than A but lower density than C and D.
• C: Higher density than A and B but shallower depth than D.

Final answer: D