What do insulin and glucagon have in common? they both provide structural support, but only insulin is a carbohydrate. they both store energy, but only glucagon is a carbohydrate. they are both hormones that regulate blood-sugar levels. they are both hormones that fight disease.

The correct answer is- They are both hormones that regulate blood-sugar levels.

Explanation:

Insulin and glucagon are hormones that are secreted by pancreatic cells. Insulin is secreted by beta cells present in the pancreas and glucagon is produced by alpha cells of the pancreas in the blood.

Insulin is secreted when the blood sugar level is increased in the blood. Insulin decrease the blood glucose level by helping in converting the glucose into glycogen called glycogenesis and storing it in muscles and liver.

Glucagon is released when the level of glucose is decreased in the blood and causes the release of glucose from liver and muscles which increases blood glucose level. So the correct answer is- They are both hormones that regulate blood sugar levels.