An example of a nonspecific defense provided by the skin is

a) antibodies.
b) fever.
c) proteins.
d) sweat.

The correct answer is- D) Sweat.

Non specific defense is a type of immune response ( also called innate immune response) that does not target any specific disease causing organism ( pathogen such as any specific bacteria or virus).

It is mainly provided by the surface of body ( such as skin that acts as an important barrier against external agents).

Sweat is an example of non specific chemical defense as it makes the surface of skin ( epithelium) acidic, thereby inhibiting the growth of pathogens ( such as bacteria) on it.

Thus, option D) is the right answer.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: