Final answer:
When tectonic plates move apart, especially at divergent boundaries, volcanic activity occurs as magma rises to fill the gap. This leads to the formation of new land and eruptions. Therefore, the correct answer is that volcanoes erupt.
Explanation:
Movement of Boundary Plates
When tectonic plates move apart from one another, a major geological phenomenon occurs known as seafloor spreading. This movement primarily happens at divergent boundaries, where two tectonic plates are moving away in opposite directions.
Effects of Divergent Boundaries
Several geological changes can result from this plate movement:
- Volcanoes erupt: As the plates move apart, magma from below the Earth's surface can rise to fill the gap, causing volcanic activity.
- Mountains form: This typically occurs at convergent boundaries rather than divergent ones.
- Earthquakes occur: While these can happen at various boundary types, they are more common at transform boundaries.
- Valleys form: Specifically, rift valleys can develop at divergent boundaries due to the thinning and sinking of the land.
Based on the provided options, the correct answer to the question—"Which is a result of boundary plates moving apart from one another?"—is that volcanoes erupt as magma reaches the surface.
Learn more about divergent boundaries here:
https://brainly.com/question/42242214