Which one of the following respiratory volumes of human lung is the...

The normal respiratory volumes for a healthy adult human are as follows:

Tidal volume (TV) is the volume of air inspired or expired during normal respiration, which is approximately $500$ mL.

Inspiratory reserve volume (IRV) is the additional volume of air a person can inspire by a forcible inspiration, which is approximately $2500$ to $3000$ mL.

Expiratory reserve volume (ERV) is the additional volume of air a person can expire by a forcible expiration, which is approximately $1000$ to $1100$ mL.

Residual volume (RV) is the volume of air remaining in the lungs even after a forcible expiration, which is approximately $1100$ to $1200$ mL.

Comparing these values, the tidal volume is the lowest.

Answer: Tidal volume