"What are the Winter months?"
This means, "What are the months of winter?" In general, "Qué" means "what" and "Cuál" (singular) or "Cuáles" (plural) means "which"--but in a case like this you would use "what" in English but "cuál" in Spanish.
Estan= to be
meses = months anos = years
Months
The Months
cuales is the plural of "which", so the translation would be "which ones".
it means the "the months of the year"
They are proud.
they are in
"Estan" from Spanish means "They are". It is the third-person, plural, conjugated form of "estar" ("to be").
12 months
He/she write the months.