At about what rate in mm/year is the Nazca Plate converging with the South American Plate just to the east of the Altiplano, the high desert plateau of central South America?

I'm pretty sure it's c. extremely gradual but not 100% sure though.

100% tortilla. it is the only possible answer

Aristotle thought so every portion of the earth tends toward the center until by compression and convergence they form a sphere. travelers going south see southern constellations rise higher above the horizon.~ hope this !

Either b or c . i did this before