After watching the videos and reading the news articles, what are the common elements/circumstances that often precede a landslide/mudslide?  According to your textbook, what are some other possible causes?  Are landslides/mudslides natural phenomena, are they human-induced, or both?  What can humans do to decrease the risks of landslides/mudslides destroying human life and property?

https://gulfnews.com/world/asia/china-landslide-death-toll-jumps-to-42-nine-missing-1.1564403272261
https://www.derbytelegraph.co.uk/news/local-news/drone-footage-reveals-extent-collapsed-3663151
https://www.aljazeera.com/news/2019/12/families-buried-alive-dozens-dead-burundi-landslides-191205133058624.html