The spelling of the word "kokla" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first letter "k" represents the voiceless velar stop sound /k/. The second syllable is pronounced with the open-mid back rounded vowel sound /ɔ/. The third letter "l" represents the voiced alveolar lateral approximant sound /l/. The final letter "a" indicates the schwa sound /ə/. Therefore, the correct phonetic transcription of the word "kokla" is /ˈkɔklə/.