Afailure of the red-sensitive nerves in the eye to respond to light properly causes
a. color blindness.
b. chromatic aberration.
c. farsightedness.
d. astigmatism.

The correct answer is A. Color blindness.

This causes the eye not only to be unable to see the Red color, but also the Green color, which leads to color blindness in people.

The answer is letter A.

Color blindness is a condition in which the red-sensitive nerves in the eye fail to respond to light properly. This condition is also known as color vision deficiency. It affects a significant percentage of the population of the world. Blindness does not literally translate to an actual blindness but rather refers to just a deficiency of color vision. People who have this condition usually obtained or took this trait directly from their parents through genetic codes embedded within the cells during reproduction.