Why do you think age generally means a lower Vital Capacity?

As people age, their lung tissue becomes less elastic, and the muscles involved in breathing can weaken, leading to a decline in respiratory function. Additionally, the chest wall becomes stiffer, which limits the expansion of the lungs during inhalation. These physiological changes contribute to a lower vital capacity, meaning that older individuals typically have a reduced ability to fully inhale and exhale air compared to younger individuals.