In Section 3 of “Self Reliance," Emerson proclaims “Trust
thyself: every heart vibrates to
that iron string."
Based on this passage, which
best describes Emerson's
meaning in describing the
string our hearts vibrate to as
an “iron” string?

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.