What climate-forming factors influence the formation of the climate in South America?

The formation of the climate on the South American continent is mainly influenced by two factors: the trade winds and the relief of the continent (the Andean ridge in particular). Seasonal trade winds that blow from the south from the north of the equator and bring warm and humid air. And if not for the mountains in the east, the continent would be deserted or semi-deserted. But thanks to the mountains, the climate is warm and humid, because they block the path of the wind.