The earth is divided into three type of tectonic boundaries such as the convergent, divergent and transforms boundary.
- The mountain building is a part of the convergent boundary that is destruction of the crust. The subduction is the process of the consumption of a tectonic boundary.
- The creation of a new ocean crust refers to the divergent boundary and an islandic arcs is also created due to the same process.
Hence the first two are convergent and the last two are divergent.
Learn more about the plate boundary at which each of the.
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