People have used ferns for which of the following purposes?

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Ferns have been used for all of these purposes. Some species of ferns have been found to effectively reduce indoor air pollution by removing toxins like formaldehyde, xylene, and toluene from the air. Ferns are also commonly used in landscaping and as ornamental plants. Some ferns contain compounds that act as diuretics, promoting urine production and helping to treat water retention and edema. Finally, certain types of ferns such as fiddleheads are edible and are considered delicacies in some parts of the world.

People Have Used Ferns for Which of the Following Purposes