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.

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: