Why Is My Pee Almost Clear - Sports

Inverse: What Color Should Your Pee Really Be? Experts Reveal Why Urine Shouldn’t Always Be Clear What Color Should Your Pee Really Be? Experts Reveal Why Urine Shouldn’t Always Be Clear Why the voiced /z/ won out over the voiceless /s/ is not clear to me.

Modern French mostly uses /gz/, as in xénophobie, but I don't know the history of how the modern French pronunciation of word-initial x became established. In the sentence "Why is this here?", is "why" an adverb? What part of speech is "why?" I think it modifies the verb "is", so I think it is an adverb.