Final answer:
The best answer to complete the analogy Convection current: atmosphere is Wave: ocean, as it represents a similar movement within a different medium.
Step-by-step explanation:
To complete the analogy Convection current: atmosphere, the most appropriate choice is Wave: ocean. This is because convection currents in the atmosphere are movements of the air caused by warm air rising and cool air sinking, much like how waves are movements in the ocean caused by energy traveling through water. Earthquakes, volcanic eruptions, and continental drift are all related to the movement of tectonic plates due to the convection currents in the Earth's mantle. These plate tectonics processes are essential in shaping the Earth's surface, leading to the creation of features like mountains, earthquakes, and volcanic activity, such as the creation of the Hawaiian island chain.