Final answer:
During moderate exercise, the Inspiratory Reserve Volume (IRV) changes more significantly as the body demands more oxygen, leading to deeper inhalations beyond the regular tidal volume.
Step-by-step explanation:
The lung value that will change more during moderate exercise is the Inspiratory Reserve Volume (IRV). During moderate exercise, the body demands more oxygen and needs to expel a greater amount of carbon dioxide. To meet this increased demand, the lungs expand more than in a resting state, which increases the IRV as the individual inhales more deeply to take in additional air beyond the normal tidal volume. While the Expiratory Reserve Volume (ERV) can also increase as the individual exhales more forcefully to expel the increased carbon dioxide, the IRV typically shows a more significant change because the primary need during exercise is for increased oxygen intake to support muscular activity.