If one part of eco-system is damaged, what happens?.

    the box has volume x^2h.  the cylinder has volume x^2h/4.  v = πr^2h = x^2h/4  πr^2 = x^2/4  r^2 = x^2/(4π)  r = x/(2√π)  b

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Some stress reducing strategies that a lot is: aromatherapy, yoga, meditation, quiet walks in the park, or listening to relaxing music.