What occurs at a constructive plate boundary?

At a constructive plate boundary, magma from beneath the Earth's crust rises to fill the gap created by the diverging tectonic plates. This process leads to the formation of new crust as the magma cools and solidifies, creating new igneous rocks. These boundaries are typically found along mid-ocean ridges, where two oceanic plates move apart, allowing volcanic activity to occur. The result is not only the generation of new rock material but also the gradual expansion of the ocean floor. This is a crucial process in the geological cycle, contributing to the continual renewal and reshaping of the Earth's crust. The other processes described in the other choices relate to different types of plate boundaries, but do not occur at constructive boundaries.