Which of the following is a method of direct attack?

A method of direct attack involves directly engaging the fire to suppress it, often through the use of techniques such as soaking the flames with water or using other extinguishing agents. This approach aims to eliminate the fire at its source.

Wet suppression of the fire refers specifically to using water or other wetting agents to cool the fire, smother the flames, and reduce heat, effectively allowing firefighters to combat the flames directly. This method is particularly effective in rapidly controlling and extinguishing wildfires when conditions are favorable and resources are available.

Digging a line, burning around the fire, and cold trailing do not represent direct attack methods. Instead, they involve creating defensible spaces or managing fuels around the fire, often in a more indirect fashion. These techniques are crucial but fall under different strategies for fire containment rather than direct suppression.