What are the similarities of mountain-building boundaries and subduction boundaries? They're both types of Transform boundaries They're both types of Divergent boundaries They're both types of Density boundaries They're both types of Convergent boundaries

They're both types of convergent boundaries.

Explanation:

There are three basic types of plate boundaries, all caused because of the movement and interaction between the plates, and all of these types have further subdivisions. When it comes to convergent boundaries, there are mountain-building boundaries and subduction boundaries. Both of them result in the formation of mountains, but from different types and processes.

The mountain-building boundaries occur between two continental plates that collide. They push against each other and create a lot of horizontal pressure on the crust near the plate boundary. By doing so, the crust is pushed up, thus a mountain chain is formed over time. A good example is the Himalayan Mountain Range.

The subduction boundaries occur between a continental and oceanic plate. The oceanic plate, being positioned lower and being denser, moves below the continental plate, thus it subducts. By doing so, the cracks that occur in the crust enable magma to rise to the surface near the plate boundary, so mountains are built again, just that they are volcanic mountains that create islands. A good example is the Japanese Islands.