What term describes a species that is brought into an ecosystem where it does not naturally occur

An exotic species (also called an introduced species) is the term that describes a species that is brought into an ecosystem where it does not naturally occur.

An exotic species is a species (plant or animals) that is living outside its native environment. Exotic species are usually brought into an environment outside their native ranges by human activity which may be inadvertent or deliberate. Most of the exotic species usually become invasive (spread and cause damage) in the environments into which they are introduced.

there’s no image attached but i can if you want: )

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.