Question

where did the gold of the inca civilization come from?
oceanic - continental convergence
transform plate boundaries
divergent plate boundaries
continental - continental convergence

Explanation:

The Inca civilization was in South America, where the Nazca Plate (oceanic) converges with the South American Plate (continental). Oceanic - continental convergence leads to subduction, and during this process, minerals like gold can be concentrated in the overriding continental plate through various geological processes such as magmatism and hydrothermal activity. Transform plate boundaries are for lateral sliding of plates (e.g., San Andreas Fault) and don't form gold deposits in this context. Divergent plate boundaries create new crust (e.g., mid - ocean ridges) and aren't the source of Inca gold. Continental - continental convergence (e.g., Himalayas formation) is about continent - continent collision, not gold formation related to Inca's gold source.

Answer:

A. oceanic - continental convergence