Final answer:
The core of Irish music is B) Jigs and reels, which are traditional folk tunes integral to Irish culture and often accompanied by classical folk instruments.
Step-by-step explanation:
The core of Irish music, which serves as the foundation for many musical styles that derive from it, is primarily B) Jigs and reels. These are forms of traditional folk music that encapsulate the essence of Irish culture through distinctive rhythmic patterns, melody, and tempo. Jigs are typically lively dance tunes in 6/8 time, while reels are played in a quick 4/4 time. Both forms are integral to Irish traditional folk music and are often accompanied by instruments like the fiddle, flute, tin whistle, and bodhrán (a type of frame drum). While step dancing, bodhrán playing, and traditional folk singing are also important aspects of Irish music, jigs and reels are the most emblematic and fundamental components of the genre.