Final answer:
Spray streams can effectively kill the heat of a large body of flame if accompanied by sufficient volume of discharge. Fluorinated solution or foam is commonly used to fight fires of organic liquids.
Step-by-step explanation:
In the context of the question, the missing word is 'volume'. When spray streams accompanied by sufficient volume of discharge are directed at a large body of flame, they can effectively dissipate the heat and extinguish the fire.
A well-known example of this is the use of fluorinated solution or foam in fighting large-scale fires of organic liquids. The foam spreads across the burning surface, depriving the fire of oxygen and cooling it down, leading to extinguishment.