Which of the following activities can lead to wildfires?

Debris burning is indeed recognized as an activity that can lead to wildfires. When debris such as leaves, branches, or other combustible materials is burned outdoors, it can easily ignite surrounding dry vegetation, especially during hot and windy conditions. The flames and embers generated by debris burning can escape control and spread rapidly, igniting nearby areas and leading to a wildfire.

In contrast, activities like planting trees, removing brush, and watering plants generally contribute to fire prevention or management rather than to the ignition of wildfires. Planting trees can enhance the environment and even provide future fuel breaks if done appropriately. Removing brush can reduce the amount of combustible material available to fuel a fire, making areas less susceptible to wildfires. Watering plants helps to maintain moisture levels in vegetation, thereby reducing their flammability. Thus, these activities are typically part of wildfire prevention strategies, unlike debris burning, which presents a direct risk for ignition.