who is eating
My dad is eating.
But he isn't eating it.
'¿Quien esta?' means: Who is there?
Quien means who (spelled Quién [accent over the e] when in a question) Está is a specific form of "is" A question ¿Quién está? can mean "Who is here?" or "Who is there?" depending on the context.
The Spanish words 'Como esta tu cabeza' translate into English as the words 'How is your head'. These words are said in Italian as 'Com e la tua testa'.
Who's helping you
"De quien" means from who?; "De quien(?)-whose(?)";
"Con quien estas" translates to "who are you with" in English.
"De quien" means "from whom"
"Hola quien eres" translates to "hello who are you" in English.
"Quien cumple años" in English means "who is having a birthday."
"Y esa quien esss" in English translates to "And who is that?"