What is the term for the movement that occurs when tectonic plates move away from each other?

The term for the movement that occurs when tectonic plates move away from each other is indeed "Constructive Plate." When plates diverge, they create new crust as magma rises to the surface and solidifies, forming features such as mid-ocean ridges. This process is a fundamental aspect of plate tectonics and is crucial for understanding how the Earth's surface is shaped over time. As the plates move apart, they can also lead to geological features that are unique to these constructive regions, making this answer the correct one in the context of tectonic activity.