What is an ecosystem?

[Stupy]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #804 "Forest Fires (1)", question 7

However, not all forest fires are bad. Some are important and essential in natural ..........

(a) barns
(b) farmhouses
(c) ranches
(d) ecosystems

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #804 "Forest Fires (1)", answer 7

However, not all forest fires are bad. Some are important and essential in natural ecosystems.

Correct answer: (d) ecosystems

Your answer was: incorrect
However, not all forest fires are bad. Some are important and essential in natural farmhouses.
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why the response is ecosyste

Patrick and Dimitry

[Linda]

An ecosystem is a complex, natural environment that consists of animals, plant life, minerals, bacteria, water, sunlight etc. Sometimes, these environments need naturally occurring forest fires to prosper - and to maintain a natural balance.

The other choices: barns, farmhouses and ranches are not essential components of this natural system.
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