What is one behavior that indicates a centipede's predatory nature?

Injecting venom is a behavior that distinctly highlights a centipede's predatory nature. Centipedes possess venomous glands, which they utilize to subdue their prey. When a centipede captures a small insect or other suitable prey, it bites and injects venom, which helps paralyze the prey, making it easier to consume. This venom plays a crucial role in their hunting strategy, allowing them to effectively hunt and kill a variety of small animals.

In contrast, the other options do not indicate predatory behavior. For instance, eating decaying matter is associated with scavengers rather than predators, while living in colonies is more characteristic of social insects and does not apply to the solitary nature of centipedes. Finally, being nocturnal pertains to their active hours but does not directly reflect predatory behavior. Therefore, the act of injecting venom is a clear demonstration of predation in centipedes.