Answer
It would be the last one D.) Homeostasis
Explanation:
Animals produce a substance called insulin, which helps them maintain healthy levels of glucose in their blood. Insulin is most directly related to - homeostasis
Blood sugar levels are tightly regulated and maintained within a narrow range by the interplay of hormones - insulin and glucagon. Insulin is a hormone that is produced by the pancreas.
Insulin regulates glucose levels in the blood. Normally excess glucose gets stored in the liver as glycogen by the hormone called insulin that maintained homeostasis in which conditions inside the body remain steady.
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