Explanation: Ultra High Frequency (UHF) is defined as the radio frequency spectrum from 300 MHz to 3,000 MHz (or 3 GHz). This range is characterized by very short wavelengths, typically from 1 meter down to 10 centimeters, making it suitable for compact antennas. UHF signals generally travel line-of-sight and are widely used for applications requiring high bandwidth over shorter distances, such as television broadcasting, cellular phones, Wi-Fi, GPS, and various amateur radio bands. Option A (3-30 MHz) describes High Frequency (HF). Option C (30-300 MHz) describes Very High Frequency (VHF). Option D (10-30 MHz) is a subset of the HF band.