True, a caliph is a Muslim ruler.
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The Neolithic Revolution was a turning point in history because.
factories began to use assembly-line techniques.
new inventions led to overseas exploration.
alternatives to hunting and gathering developed.
the use of chemical fertilizers increased agricultural production.
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Answer:
this my answer
/hope's helps/
Explanation:
It can have different compositions, but it has a set of characteristics that does not change.
I believe the answers are:
People in rural areas are poor and huge population impacts size of problem
