Louisiana Purchase lied between the Mississippi River and the Rocky Mountains - Mississippi river was in the East and Rocky Mountains in the west, which means that the correct answer is "Rocky Mountains".
They are both natural borders: both are hard to attack and easy to defend, making them a natural border.
You're never too old to trick or treat.
Most teenagers trick or treat not for the candy but to hang out with friends.
The 19th amendment which was published in 1920
The placebo effect is when somebody's physical or mental health appears to improve after accepting a placebo or 'dummy' treatment.
<h3>How does the placebo effect result in the brain?</h3>
The placebo effect increases activity in an area called the rostral ventromedial medulla, which transfers pain information, and reduces activity in the periaqueductal gray, which helps the body suppress pain. The nocebo effect generated the opposite change.
In anticipation of benefit when a placebo is administered, dopamine receptors are started in regions of the brain associated with prize. As further evidence that the placebo effect is a authentic biological phenomenon, genetics can influence the strength of the effect.
To learn more about the placebo effect visit the link
brainly.com/question/5069588
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