Which type of supply line evolution is performed by two engine companies in situations where hose must be laid in two different directions to establish a water supply?

The correct answer is the split hose lay, which is specifically designed to accommodate situations where two engine companies need to lay hose in different directions to effectively establish a water supply. This method allows for efficient deployment of hose lines with minimal interference with each other, ensuring both engine companies can operate simultaneously in their designated areas.

In this evolution, each engine can lay hose to reach different water sources or to supply firefighting operations at different locations, enhancing the effectiveness of the response. By allowing for two separate paths for water delivery, the split hose lay maximizes the utilization of resources and can provide support in larger incidents where more than one line of attack is necessary.

Other hose lay methods, while useful in different contexts, do not fit the scenario described. The forward hose lay typically involves laying hose from a water source to the fire, while a reverse hose lay focuses on bringing a water source back from the fire, both directed in a single line. A loop hose lay encompasses a method that circulates the hose back on itself, which is not suitable for the need to lay hose in two directions simultaneously.