Which scenario is an example of a negative feedback loop?

a.
when body temperature increases, sweat is produced as a cooling agent to lower body temperature.
b.
in some parts of the world, birth rates are far exceeding death rates, which has led to overpopulation.
c.
ice reflects sunlight much better than water. a warmer atmosphere is turning ice to water, which is absorbing more of the sun’s energy.
d.
a warmer atmosphere is leading to warmer oceans. a warm ocean releases more carbon dioxide, which traps more heat in earth’s atmosphere.

A.  When body temperature increases, sweat is produced as a cooling agent to lower body temperature.

Explanation:

A negative feedback mechanism is one that works by reducing a given stimulus. This mechanism is directly linked to maintaining our body's balance (homeostasis) and hormone secretion.

Sweat acts as a negative feedback mechanism as follows: When the nervous system detects the change in temperature during exercise, for example, it understands this change and stimulates the release of sweat.

As we perspire, sweat gets on the skin and then evaporates, cooling the body.

In other words, this means that by detecting the increase in body temperature, the body caused it to decrease as negative feedback through the production of sweat.

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