**Core Concept**
In hemolytic anemia, the body's red blood cells are destroyed faster than they can be made. This leads to a decrease in the number of red blood cells, which can cause various symptoms such as fatigue, weakness, and shortness of breath. The absence of a particular component in hemolytic anemia is crucial for understanding the underlying pathophysiology.

**Why the Correct Answer is Right**
The correct answer is related to the enzyme glucose-6-phosphate dehydrogenase (G6PD). G6PD is an enzyme that protects red blood cells from oxidative damage. In hemolytic anemia, especially in conditions like G6PD deficiency, the red blood cells are more susceptible to oxidative stress and are destroyed prematurely. This leads to an acute hemolytic anemia, which can be triggered by various factors such as certain medications, infections, or certain foods.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the absence of glucose-6-phosphate dehydrogenase (G6PD) is the correct answer.
**Option B:** This option is incorrect because, while certain types of hemolytic anemia may be associated with a decrease in the production of red blood cells, this is not the correct answer.
**Option C:** This option is incorrect because, while certain types of hemolytic anemia may be associated with an increase in the breakdown of red blood cells, this is not the correct answer.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that G6PD deficiency is a common cause of hemolytic anemia, especially in individuals from certain ethnic backgrounds. A classic example of a trigger for hemolytic anemia in G6PD deficiency is the antibiotic primaquine, which can cause a severe hemolytic reaction in affected individuals.

**Correct Answer:** D.