Answer:
The words or phrases that should be deleted to eliminate redundancy are "Without a sound", "individual" and "below our house"
Step-by-step explanation:
"Quietly", and "without a sound" create redundancy since the two expressions are referring to the lack of sound, the second example "down the stairs" "the basement" and "below our house" talk about the same location, besides basements are always under the houses. In the last example "each" and "individual" sound talks about the same unique sound or it separately sees a group of sounds.