Which of the following is a common factor in the outbreak of wildfires?

Lightning strikes are a recognized common factor in the outbreak of wildfires, as they are a natural source of ignition that can quickly spark flames in dry vegetation. When conditions are dry and there is an accumulation of flammable material, a single lightning strike can ignite a fire that may rapidly spread, particularly in forested areas or grasslands. The natural occurrence of lightning, especially during hot, dry weather, has historically led to many wildfires, and it is a significant contributor to wildfire incidents each year.

In contrast, while factors like excessive forest management, natural gas pipelines, and heavy industrialization can contribute to fire risks or complicate firefighting efforts, lightning serves as a primary natural ignition source. As such, it is critical for fire prevention and management strategies to consider the role of lightning strikes in wildfire behavior and occurrence.