Which unit is characterized by securing water sources and putting water on the fire?

The unit that is characterized by securing water sources and putting water on the fire is the Engine Company. This team's primary responsibility is to transport water to the scene of a fire and apply it to suppress the flames. The Engine Company is equipped with fire engines that carry both water and the necessary pumping equipment to ensure an effective water supply. They often set up hose lines and may also be involved in establishing a connection to hydrants or other water sources to maintain a steady flow of water during firefighting operations. Their expertise is vital during the initial stages of firefighting when controlling the fire is crucial to protecting life and property.

In contrast, other units such as a Truck Company primarily focus on ventilation, search and rescue, and ladder operations rather than water application. A Hazardous Materials Team deals with incidents involving hazardous substances and does not typically engage in firefighting tasks, while a Support Company provides logistical support and resources rather than being directly involved in firefighting efforts. This clear distinction in roles highlights why the work of an Engine Company is essential for effective fire suppression.