Is body temperature interval or ratio scale? I understand that temperature is interval scale because it holds no true zero and can represent values below zero. But in case of body temperature it cannot go below a certain point and definitely not below zero. So in that case, will body temperature be a ratio scale?

Any temperature, including body temperature, has a natural zero: $0$ K $(-273.15 °C)$. So, if you express it in Kelvins, it is ratio scaled. An object at 2000 K is twice as hot as an object at 1000 K.
