Answer:Let me explain each answer:1. D. Tempo - This is correct because tempo specifically refers to the speed or pace at which music is played. While dynamics deals with volume, harmony with combined notes, and pitch with high/low sounds, tempo is exclusively about the rate of speed in music.2. B. a quick, lively tempo - "Ob-La-Di, Ob-La-Da" by The Beatles is known for its upbeat, bouncy rhythm and cheerful pace. The song has a bright, energetic tempo that makes it perfect for dancing and singing along.3. A. Accelerando (accel.) - This is the correct Italian musical term that means gradually increasing speed. While lento means slow, ritardando means gradually slowing down, and presto means very fast, accelerando specifically describes the gradual change from slower to faster tempo.4. A. metronome - A metronome is a device that produces regular, steady beats at a selected speed to help musicians maintain consistent timing. It's an essential practice tool that helps develop accurate rhythm and tempo control. Piano is an instrument, and rhythm is the pattern of beats.5. A. It should be played in a fast and lively tempo - Joyful music typically requires an upbeat, energetic tempo to convey happiness and excitement. Fast and lively tempos naturally create a sense of energy and cheerfulness that matches joyful emotions. Slower tempos are more associated with calm, sad, or serious moods.