Final answer:
At a convergent-plate boundary, two opposed plates are moving toward each other. When two plates come together at a convergent boundary, one plate is often forced beneath another in a process called subduction. Some examples of convergent boundaries include the Cascade Mountains in the United States and the Andes Mountains.
Step-by-step explanation:
At a convergent-plate boundary, two opposed plates are moving toward each other.
When two plates come together at a convergent boundary, one plate is often forced beneath another in a process called subduction. This occurs when an oceanic plate, which is thinner and denser, subducts beneath a continental plate. The subduction zone is marked by an ocean trench where the subducting plate is forced down into the mantle.
Some examples of convergent boundaries include the collision of the Pacific Plate with the North American Plate, which has formed the Cascade Mountains in the United States, and the collision of the Nazca Plate with the South American Plate, which has formed the Andes Mountains.