Answer :
Final answer:
The boundaries of lithospheric plates are primarily defined by zones of seismic activity.
Explanation:
The lithospheric plates, which make up the Earth's outer shell, are divided into various segments or plates that move and interact with each other. The boundaries of these lithospheric plates are primarily defined by zones of seismic activity, where earthquakes and other seismic events occur. These zones, known as plate boundaries, mark the edges of the plates and are characterized by intense geological activity caused by the movement and interaction of these plates.
At these plate boundaries, tectonic forces cause stress and deformation, resulting in seismic activity such as earthquakes and volcanic eruptions. The movements of the lithospheric plates along these boundaries are integral to the study of plate tectonics and provide valuable insights into the dynamic processes that shape the Earth's surface and geology.
While zones of deep trenches and zones of large mountain belts are associated with plate boundaries and are influenced by the movements of lithospheric plates, seismic activity is the most prominent and defining characteristic used to identify and delineate these boundaries.
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