It’s acidic?
It tastes sour
It has at least one hydrogen molecule
The answer is b because if you’re fan is blowing and you spend it the opposite way, the air will be cooler
The glow emitted by a substance exposed to external radiation is called 'fluorescence'. In fluorescence, a fluorophore is exposed to external radiation, absorbs the energy and emits a form of light or glow. The answer to this question is 'fluorescence'. I hope this helps.