 
<translate> Raunin kwakwalwa sakamakon rashin iskar oxygen. Hawan dutse na iya haifar da asarar iskar oxygen. Rashin iskar oxygen yana da lahani. Rashin iskar oxygen yana faruwa ne a cikin kwakwalwa. Saboda haka, amsar karshe ita ce rashin iskar oxygen. <eng> Brain injury results from loss of oxygen. Climbing can result in loss of oxygen. Loss of oxygen is fatal. Loss of oxygen happens in the brain.
So, the final answer is loss of oxygen. 