Which type of volcanism formed the andes in south america?

production of mantle plumes

divergence between two continental plates

convergence between a continental plate and an oceanic plate

convergence between two continental plates

The convergence between a continental plate and an oceanic plate is subduction process where the denser oceanic plate force the thinner continental plate to sink into the mantle.

Option (D)

Explanation:

The type of volcanism formed the Andean Mountains in South America is due to subduction process.  It is due to the converging of Nazca Plate over Antarctic Plate due to gravity and made them to sink below the South American Plate.

This process still continues today and due to the activity, it causes volcanic eruptions and earthquakes in that region. It was reported about 150 - 160 (approx.) active volcanoes in the Volcanic Belt of Andes.