Final answer:
Convergent boundaries are characterized by the process of subduction, where one tectonic plate is forced beneath another, leading to features such as deep ocean trenches and volcanic activity. The correct option is B.
Step-by-step explanation:
The statement that best describes convergent boundaries is "Subduction Occurs." At convergent boundaries, tectonic plates are moving toward each other. When plates converge, one of the colliding plates, typically an oceanic plate due to its density, is forced beneath the other into the mantle where it melts. This process is known as subduction.
Convergent boundaries can form features like deep ocean trenches and volcanic mountain ranges as the subducted plate is melted and the material is recycled within the Earth's mantle. Contrastingly, divergent boundaries are areas where plates are pulling apart from each other, which can result in the formation of rifts.