An example of a positive feedback loop would be
a. the release of a hormone in response to a single stimulus.
b. the release of glucagon in response to low blood sugar.
c. the release of oxytocin in response to stretching of the uterus.
d. All of these

The correct answer is - option C.

Explanation:

A positive feedback loop is a system that occur in nature when production of a specific reaction leads to increase in its own production or reaction. Oxytocin is an example of the positive feedback loop as the release of its higher concentration.

Contraction of the uterus cause the release of the oxytocin that leads to more contraction which lead higher concentration of the hormone. So the positive feedback loop cause the shift in the system, far from the equilibrium.

Thus, the correct answer is - option c.

answer///meditation;