Read this: The extreme and stressful climatic conditions give way to the growth of plant species with secondary metabolites important for medicinal purposes. Origanum vulgare, Prunella vulgaris, Solanum nigrum and Urtica dioica are some of the more useful medicinal species found in the Alps.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): What gives way to the growth of plant species with secondary metabolites important for medicinal purposes?
extreme and stressful climatic conditions