The RAE (similar to the Oxford Dictionary in English) includes ‘por qué’ as an adverbial phrase under the entry for ‘por’ meaning “for what reason, cause or motive”. ‘Porque’ is a conjunction that translates to “because”. And for fun, ‘porqué’ is a noun, similar to how in English you ask about “the why” or reason behind or for something. ‘El porqué’ would be “the answer” to the question ‘¿por qué?’
The RAE (similar to the Oxford Dictionary in English) includes ‘por qué’ as an adverbial phrase under the entry for ‘por’ meaning “for what reason, cause or motive”. ‘Porque’ is a conjunction that translates to “because”. And for fun, ‘porqué’ is a noun, similar to how in English you ask about “the why” or reason behind or for something. ‘El porqué’ would be “the answer” to the question ‘¿por qué?’