The spelling of the word "Laurra" can be explained using the International Phonetic Alphabet (IPA) transcription. Each letter in the word has a corresponding phonetic sound. "L" is pronounced as /l/, "a" is pronounced as /ɑː/, "u" is pronounced as /uː/, "r" is pronounced as /r/, and "a" again is pronounced as /ɑː/. Thus, the correct spelling of "Laurra" is based on the combination of these phonetic sounds. This demonstrates the importance of understanding phonetics in order to spell words accurately.