In What Ways Do Populations of Organisms (Communities) Interact?

In most cases, many species share a habitat, and the interactions between them play a major role in regulating population growth and abundance. Together, the populations of all the different species that live together in an area make up what's called an ecological community.

Explanation:

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

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.