Answer:
Half step, or 1 semi tone.
Explanation:
INTERVAL TYPE DISTANCE IN SEMI-TONES NAME
second 1 minor 2nd
The correct answer is letter D. Hector Belioz was a very influential French Romantic composer best for his known compositions called Symphonie Fantastique and Grande Messe Des Morts (Requiem). With some of his works, he had made significant contributions to the modern orchestra and has conducted several orchestras through his lifetime.