Which process allows a submarine to sink or rise by adjusting water in ballast tanks?
A
Changing buoyancy through water displacement
B
Evaporation
C
Osmosis
D
Thermal expansion
Correct Answer: Option A — Changing buoyancy through water displacement
Explanation:
Submarines control their depth by filling or emptying ballast tanks with water to change their overall density relative to the surrounding water adjusting buoyancy.