Activity: Video do Krashen

http://www.youtube.com/watch?v=NiTsduRreug

Watch the video (the link is right above) and answer the following questions below:

1) How do we acquire language?
2)Are there any individual variations that can make a person learn a language better and faster than the others?
3) Bear in mind the example of the japanese girl he mentions in his talk,  when was the beginning of her language acquisition? When she started to listen or to speak?
4) Explain in a few words what is the COMPREHENSIBLE INPUT and the AFFECTIVE FILTER HYPOTHESIS.