What characteristic of frequency hopping helps prevent interception?

The characteristic of rapidly changing frequencies is crucial in enhancing security and preventing interception in frequency hopping communication systems. By quickly switching between different frequencies within a designated band, the system makes it significantly more challenging for unauthorized listeners to track or predict the signal. This technique lowers the probability that an interceptor can capture and decipher the communication because they would need to know the exact sequence of frequencies being used at any given moment.

In contrast, stability of the signal would imply a continuous, predictable transmission, which could be more easily intercepted. Using low frequencies does not inherently add to the security of the communication and may even allow for easier interception in some cases. Consistent transmission power could also provide a stronger signal that could be easier to detect and eavesdrop on. Thus, the rapidly changing nature of frequencies is a key factor in enhancing the security of the communication and reducing the risk of interception.