Hope this helps! feel free to clarify
An example of a social reason for voluntary migration would be the need to live near extended family.
Hope this helps!
The water cycle
which is whats used to use water for energy
B was wrong for me, the answer was map making for me.
The one that has been a contemporary concern in northwestern china is : Religious Tension
The northwester part of china is the largest muslim community in China. There often a tension between the Muslims and the people who held Chinese original beliefs (Buddha or Taoism)
hope this helps