Which of the following atmospheric components is beneficial to humans at higher altitudes, but dangerous near ground level? A. carbon dioxide
B. sulfuric acid
C. oxygen
D. ozone

is it a purebred? it looks more like a red nose, but it doesn't have the red could it be a staffordshire bull terrior? unsure if that's the right name for it sorry

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.