Why does south america have several cultures?

The geographical vastness of the South American continent, a diverse climatic pattern, presence of explicitly distinctive landforms from deserts to rainforests and from grasslands to mountains, difference in the levels of development, etc. are the main factors responsible for the existence of several cultures in South America.

Explanation:

The South American continent is home to twelve small and large sovereign countries. Each country has a culture of itself having no or a partial resemblance with the other. These cultures are mainly governed by regional geography.

I believe because some prats of south amsica where conceyed by different people Spain and proutugul and because of the different tribes of native poeple