Answer: A cannabinoid is one of a class of diverse chemical compounds that acts on cannabinoid receptors, also known as the endocannabinoid system in cells that alter neurotransmitter release in the brain
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Ballon
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because it goes up but at the same place
The cotton gin because it helped produce cotton much more fast than it took to remove the seeds and leaves by hand.
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Oh, I actually never knew that lol and I am already passed 3rd grade. But that’s sad...=/
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Have a great day!