geography

https://www.learner.org/vod/vod_window.html?pid=315

Watch the video and then, there are 4 parts in my upload,  writen by my classmates, please make reply(comment) for each paragraph, each reply should around 100 words, this is dicussion homework, so you dont have to write too much. Four thoughtful, responses to the postings. and do not copy from other websites .