What is the best example of a "system" as that term is defined in your text?

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A rainforest is a complex system in which different species of plants and animals depend on each other for survival. This system involves numerous interactions between different organisms, as well as between organisms and their environment. The rainforest ecosystem includes various types of vegetation, such as trees, shrubs, and vines, as well as animals like insects, birds, primates, and reptiles. These organisms all play an important role in maintaining the balance of the ecosystem, and changes to one part of the system can have cascading effects on other parts. Overall, the rainforest is a great example of a system because it is composed of multiple interconnected parts that work together to produce a complex and dynamic whole.

What Is the Best Example of a "System" as That