The fight-or-flight response is subject to large individual differences involves arousal of the parasympathetic nervous system involves arousal of the sympathetic nervous system and the endocrine system is never adaptive

what are the choices?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

it's c.us forest service