The correct answer among all the other choices is :
d) ocean-continental convergence.
This is where the gold of the Inca civilization comes from.
Step-by-step explanation:
A geologic process zone is made at a convergent plate boundary once one or each of the tectonic plates consists of oceanic crust. The denser plate, fabricated from oceanic crust, is subducted beneath the less dense plate, which may be either continental or oceanic crust.