The Match of each letter that appears on the diagram with the appropriate feature are given below.
D: Subduction Zone
A: Rift Valley
C: Volcanoes
B: Highly-folded Mountains
A subduction zone is a type of tectonic plate boundary where one tectonic plate is forced underneath another. This can occur when two plates of different densities collide. The denser plate is forced down into the mantle, the Earth's lower layer.
Lastly, A rift valley is a long, narrow valley that forms where two tectonic plates are pulling apart. This can occur when the two plates are moving in opposite directions. The space between the two plates is filled with magma, which rises to the surface and cools to form new crust.