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when did domesticated begen
Natural barriers are geographical features that provide obstacles.
Appalachian mountains
Mountain ranges can sometimes be barriers Rivers and lakes can also be barriers Dense forests can slow exploration
Natural barriers are like the use of mountains or rivers to protect a place. but if you want to know what Egypt's are, I'd suggest putting that in your question.Natural Barriers are features such as Rivers, Mountains, Oceans, Seas etc...
There are a variety of geographic features in Nevada
Back to the Future
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okay
California's state flowere is the poppy