Question

respiratory means : relating to the process of giving birth pertaining to the act of breathing pertaining to the use of life support relating to the properties of sound

Explanation:

The word "respiratory" is related to the respiratory system in the body. The respiratory system's main function is breathing. "Relating to the process of giving birth" is obstetric - related. "Pertaining to the use of life support" is a broader medical support concept not specific to respiration. "Relating to the properties of sound" is acoustic - related.

Answer:

pertaining to the act of breathing