What is plate margin?

• A. The boundary between two tectonic plates
• B. The center of a tectonic plate
• C. A meteorological boundary
• D. A type of rock

Answer: (A)

Plate margins are the boundaries where tectonic plates meet and interact. It’s at these margins that movement in different directions—pulling apart, colliding, or sliding past each other—drives most of the Earth’s seismic and volcanic activity. There are three main types: divergent margins where plates move apart, convergent margins where they collide, and transform margins where they slide sideways past each other. So the correct idea is that a plate margin is the boundary between two tectonic plates. The center of a plate isn’t a boundary, meteorological boundaries relate to weather, and a rock type doesn’t describe a boundary between plates.