Final answer:
Fracture zones that offset portions of mid-ocean ridges are examples of transform boundaries, where plates slide horizontally past each other.
Step-by-step explanation:
The fracture zones that offset portions of mid-ocean ridges are examples of transform boundaries. Transform boundaries are characterized by plates sliding past each other horizontally.
In this case, the plates slide horizontally and create fractures or faults at the mid-ocean ridges, resulting in the offset of portions of the ridge.