D CHLOROPHYAT NOT THE OTHER ONES
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.
You could put salt-crystals outside during different times of the day when the temperature drops or rises.
the answer is b, faster through steel than through air.
