Explanation:
Magma from the volcano turns into solid rock when it cools down with water and creates new islands or sea mountains.
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The correct answer is D. ocean floor mapping and earthquake tracking
Tracking earthquakes is helpful because it shows where it came from and what caused it, as well as how it affected the environment, while ocean floor mapping is useful because it shows how the bottom of the sea changed over time which happens due to tectonic activity.
The answer is a stream. The water leaves a lake through a stream to maintain the freshness of the lake waer. A stream is where the water flows downhill from an open lake. An open lake is where the water flows constantly so that the water is fresh.
