The food of flea larvae is primarily comprised of what?

Flea larvae primarily feed on detritus that has accumulated in their environment, which includes organic matter such as dried blood from adult fleas, skin flakes, and other debris. This detritus is essential for the development of flea larvae, providing the necessary nutrients for growth.

While some might consider the option of dried blood as a food source, it is important to recognize that larvae do not specifically seek out dried blood exclusively; rather, they take advantage of the organic materials present in their surroundings. The broader category of detritus encompasses a variety of nutrients, making it the most accurate answer regarding the typical diet of flea larvae.

The other choices, such as pollen, dried blood from the female flea, and plant matter, do not accurately reflect the primary food source of flea larvae. Pollen is not typically associated with the diet of flea larvae, and while they do consume some components of blood, it is not exclusive or even the predominant part of their diet. Thus, recognizing that detritus from the environment provides a wide range of necessary nutrients clarifies the correct answer.