Because global temperatures are , some species are seeking out elevations in the Himalayas to colonize. Scientists were worried that these organisms would not have enough to live, but they have found that there is adequate at higher elevations. This movement may help these organisms survive the effects of .

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up