Which genre is known for heavy use of synthesizers and electronic instruments since the late 1970s?

The genre known for heavy use of synthesizers and electronic instruments since the late 1970s is electronic dance music (EDM). This style emerged as a prominent genre in the late 20th century, when advancements in technology allowed musicians to create and manipulate sounds in ways that were previously unachievable. Synthesizers, drum machines, and sequencers became central to the production of EDM, enabling artists to craft complex rhythms and textures that define the sound.

EDM encompasses a wide variety of subgenres, including house, techno, and trance, each of which utilizes electronic sounds extensively. The genre's rise was marked by the increasing popularity of nightclubs and raves, where DJ sets and live performances showcased the innovative use of electronic instruments, creating immersive auditory experiences for audiences.

In contrast, while rock, jazz, and country have evolved and incorporated some electronic elements over time, they do not primarily rely on synthesizers and electronic instruments to the same extent as EDM. Rock often emphasizes guitars and organic instruments, jazz focuses on improvisation with traditional instruments, and country tends to highlight acoustic sounds and storytelling lyrics. Thus, the distinctive characteristic of EDM’s reliance on synthesizers makes it the correct answer.