Harmonic resonance is a phenomenon that occurs when an object vibrates at a specific frequency, known as its natural frequency. When an external force or wave matches this frequency, the object can absorb energy, leading to increased amplitude of its vibrations. This principle is commonly observed in musical instruments, where strings or air columns resonate to produce sound. In physics, harmonic resonance is important in various fields, including engineering and architecture. For example, buildings must be designed to withstand harmonic resonance caused by earthquakes or wind, ensuring they do not vibrate excessively and risk structural failure. Understanding this concept helps in creating safer environments.