Which of the following describes a characteristic of tectonic plates?

Tectonic plates are indeed characterized by their movement and ability to deform. These plates float on the semi-fluid asthenosphere beneath them, allowing them to shift and interact with one another. Their movement is not uniform across all plates; instead, they can move at varying speeds and directions, influenced by convection currents in the mantle. The interaction of these plates can lead to various geological phenomena, such as earthquakes, volcanic activity, and mountain-building, demonstrating their dynamic nature. Additionally, while some deformation occurs at the boundaries of these plates where they interact, this characteristic of movement and deformation is what fundamentally defines tectonic plates in the context of plate tectonics.