What characteristic classifies the cicada killer as beneficial?

The classification of the cicada killer as beneficial can be attributed to its holometabolous developmental cycle and its chewing mouthparts. Holometabolous insects undergo complete metamorphosis, which includes distinct life stages: egg, larva, pupa, and adult. This life cycle allows for specific ecological roles at different stages and generally leads to more effective pest management.

The cicada killer, specifically, utilizes its chewing mouthparts to capture cicadas, which are often viewed as pests in many agricultural settings. By preying on cicadas, cicada killers help in controlling their populations, providing a natural means of pest management that reduces the reliance on chemical insecticides.

In contrast, the other options might suggest alternative developmental types or mouthpart classifications that do not accurately represent the cicada killer’s biology or the beneficial role it plays within its ecosystem. The chewing mouthparts indicate that it actively hunts and feeds, emphasizing its role in maintaining ecological balance by managing pest populations.