Physical- Shiny and silvery describes the physical characteristics of something.
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A aquifer<span> names an underground area that collects and holds a large amount of water.
I know this because an aquifer collects water.
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A- Gravity. I believe it is gravity since that is the only one that makes sense in this situation. I hope i helped! :)
Insulin causes blood glucose levels to drop, which signals the pancreas to stop producing insulin in a negative feedback loop. Hormonal stimuli refer to the release of a hormone in response to another hormone. A number of endocrine glands release hormones when stimulated by hormones released by other endocrine organs.