Final answer:
Divergent plate boundaries result in the formation of structures like mid-ocean ridges and rift valleys.
Step-by-step explanation:
Divergent plate boundaries occur when lithospheric plates move away from each other. This movement leads to the formation of various structures. One common structure that forms at divergent plate boundaries is a mid-ocean ridge. Mid-ocean ridges are underwater mountain ranges that form as new crust is created through volcanic activity.
Another structure that can form is a rift valley, which occurs when a divergent boundary is located on land. Rift valleys are characterized by a depressed and elongated basin between two normal faults. Examples of rift valleys include the East African Rift Valley and the Rio Grande Rift in North America.