What are some environmental factors (stimuli) that organisms respond to?

There are some environmental factors of which organisms respond to in order to maintain balance in its course of life, the factors or stimuli that they respond to are the following, weather, temperature, air, water and other organisms living in the area or other areas.

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.