Final answer:
The consonant segment that is a voiceless palatal fricative is represented by the IPA symbol /esh/, which is option d) in the given choices.
Step-by-step explanation:
The consonant segment that is a voiceless palatal fricative is represented by the International Phonetic Alphabet (IPA) symbol /esh/, which appears as a long 's' (similar to an elongated 'f'). The correct answer for this consonant sound among the given options is therefore d) /esh/. It is not represented by the other options: /p/, /f/, /theta/, or /g/.
The voiceless palatal fricative is represented by the consonant segment /esh/. It is the correct answer in the options provided. An example of a word that contains the voiceless palatal fricative sound is 'fish'.