Concept:The required phonetic sound is /æ/, the short vowel found in
bag.
Explanation:Check each option for its vowel sound.
bag = /bæɡ/, so it contains /æ/.
park = /pɑːk/, so it contains /ɑː/ instead.
get = /ɡet/, so it contains /e/ instead.
class = /klɑːs/, so it contains /ɑː/ in standard British pronunciation.
Therefore, only
bag matches the phonetic symbol /æ/.
Answer:A. bag