Concept:The given phonetic symbol is the long vowel sound /ɜː/, as heard in "herb".
Explanation:Read each word aloud and compare its vowel sound with /ɜː/.
"heart" is pronounced /hɑːt/, which has /ɑː/.
"floor" is pronounced /flɔː/, which has /ɔː/.
"herb" is pronounced /hɜːb/, which contains /ɜː/ correctly.
"fork" is pronounced /fɔːk/, which also has /ɔː/.
So only the word "herb" matches the given sound.
Answer:C. herb