The document discusses several theories of language development, including that primitive humans developed vocal abilities through making sounds, languages evolved over a long period of time, and children acquire language from listening to and interacting with their parents and social environment, as theorized by Vygotsky. Language depends on social experiences and influences.

2. Theories
Aquisition
children
Primitive man
Vigotsky, principales-teorias-del-desarrollo-del-lenguaje-sobre
http://www.ehowenespanol.com/principales-teorias-del-desarrollo-del-lenguaje-sobre_459829/

3. Experience as a group
1. Humans had have a long proces to develop
a language.
2. The evolution of vocal apparatus was thanks
to the sounds that the primitive man did ín
order to emit sounds.
3. Languages depend on the social environment
because children listen to their parents and people
around them, and they start to speak. (Vigotsky)
http://www.ehowenespanol.com/principales-teorias-del-desarrollo-del-lenguaje-sobre_459829/