Answer:

E.Nature material

Explanation:

When the sound bump onto material it may stop the passage to travel the sound dirrectly,example:it affects to hear your voice when you shout when the place is too close.

Carry on learning

Answer:

E.

Explanation:

Nature material is affecting those speed if sound, (halimbawa po, yung parang kapag nagrerecord ka tapos buglang may umihip na malakas na hangin) its calls nature materials po,

HOPE IT HELPS☺️