Which type of broadcasts primarily use AM for voice communications?

The correct answer pertains to the specific use of AM (Amplitude Modulation) for voice communications, particularly in the context of radio broadcasting. AM is a modulation technique traditionally used for radio broadcasts, especially in talk radio and programming that focuses primarily on spoken content, such as sports broadcasts. Sports broadcasts, in particular, often rely on live commentary, updates, and play-by-play analysis, making voice communication essential.

Voice communications benefit from AM's ability to cover long distances and its straightforward transmission technology, which is particularly well-suited for live commentary and reporting in sports. While music broadcasts can also utilize AM, they often shift towards FM (Frequency Modulation) due to its superior sound quality, which makes it less optimal for voice-only content. Similarly, educational programs and video broadcasts generally favor other forms of transmission or modulation, focusing on visual content or high-fidelity audio that AM can't adequately provide. Thus, the emphasis on voice communication in sports broadcasts aligns perfectly with the characteristics and traditional use of AM technology.