Answer:
The arrangement of the "Rocky Mountain system" is caused by the subduction of a "tectonic plate", which pushed up a "neighboring plate" into mountains.
Step-by-step explanation:
- The Rocky Mountains were formed on the western side of the North American continent around 300 million years ago due to the subduction of the Pacific plate below the "North American plate".
- The consistent and gradual subduction of heavier Pacific plate below the lighter "North American plate" caused the continental plate to rise substantially giving birth to the "Rocky Mountain system".