What unique feature does the larvae of the case making clothes moth exhibit?

The unique feature exhibited by the larvae of the case-making clothes moth is that it spins a silk case around itself. This characteristic is particularly important as it serves several purposes for the larva's survival. The silk case, often referred to as a "cocoon" or "case," provides physical protection from predators and environmental factors. Additionally, it allows the larva to camouflage itself, blending in with its surroundings, which helps it avoid detection.

The design of the silk case can vary, often incorporating elements from the larva's food source, such as bits of wool or fabric, which enhances its disguise. This adaptive behavior is crucial for the larva's development, as it allows it to feed and grow while mitigating risks associated with exposure.

In contrast, the other provided options focus on features that do not characterize the larvae of the case-making clothes moth, such as lacking protection or the ability to change color, which do not apply to this specific life stage. The feeding behavior on wool and silk, while true about its diet, does not relate to the unique aspect of its protective case.