Which of the following examples best represent the levels of organization from least to most complex?

Question

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Lung cell -> lung tissue -> lung -> respiratory system -> human
Human -> lung tissue -> respiratory system -> lung cell -> lung
Lung cell -> respiratory system -> lung tissue -> lungs -> human
Respiratory System -> lungs -> body cell -> lung tissue -> human

Answer 1

The correct answer is:

Lung cell -> lung tissue -> lung -> respiratory system -> human