Define the following term: ecosystem
question options:

a)a community of organisms that all live in the same area and eat the same food

b)a community of people living in the same neighborhood

c) a community of organisms that live in a particular area

d)a community of dogs who all like the same bone

i chose a for my answer ,but i wasn't sure if i was correct or not . to whoever me: ).

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.