which sentence from the text describes a problem with walkers match that the phosphorus match tried to solve

The authors choice of words and language

Afirefighter is a rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property and the environment as well as to rescue people and animals from dangerous situations.  just cut some parts to make them shorter and add some of your facts or what describes them most. or what they are supposed to do.

Correct answer is: a.euphrates