The relationships between a community of plants and animals and their environment are known as a(n) food chain food web ecosystem life cycle

The answer is ecosystem!

I like to think of an ecosystem as a web. Webs spun by spiders are often very intricate and unique. If you were to cut out a piece of a web you would lose the overall stability. JUST like a ecosystem. Ecosystems are very fragile yet beautiful and unique!

I hope this helps!

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Ciao!

♥, Sadie  

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.

if someone had the list of traits you provided