Ead the article “Lichens Are an Early Warning System for Forest Health,” and then answer the following questions.

Part A
Explain why the forest ecosystem is a system. Use examples from the article to support your explanation.

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An ecosystem is defined as a biological system which is composed of living organisms and a physical environment where they coexist and are related, it is a system since this is by definition a complex object in which its parts are related to at least one component In the case of ecosystems, each species can be related to others, such as their food, the place where their young grow, or the relationship with other species such as symbiosis.