What is a physiological disorder that can result from air pollution damage in plants?

Physiological disorders in plants can manifest as various symptoms resulting from environmental stressors, including air pollution. In this context, all the mentioned options can indeed be influenced by air pollution.

Root injury from mechanical causes typically involves physical damage to the root system. However, such damage can be exacerbated by pollutants that negatively affect soil quality and structure, thereby impacting root health indirectly.

Blasting of flower buds is a specific disorder that results from damage due to environmental factors, including air pollutants such as sulfur dioxide and ozone. These pollutants can disrupt normal physiological processes and reduce the viability of reproductive structures in the plant, leading to bud blasting.

Moisture stress is another significant physiological response. Air pollutants can impair the plant's ability to uptake water efficiently due to damage to leaves and roots, which may lead to increased transpiration and ultimately to water deficiency within the plant.

Given that all these conditions can arise due to the effects of air pollution on plant health, the choice encompassing all of them is indeed the most comprehensive and accurate. Each of these disorders illustrates a different aspect of how air pollution can adversely affect plant physiology.