Concept:The word "sheath" contains the long vowel sound /iː/.Explanation:"Sheath" is pronounced /ʃiːθ/, so the underlined letters "ea" produce /iː/.Now check each option for its vowel sound."Meadow" has /ɛ/, and "weather" has /ɛ/."Heart" has /ɑː/, but "beach" has /iː/.Thus, "beach" has the same vowel sound as "sheath."Answer:D. beach