Concept:Stress is the emphasis placed on one syllable in a word when it is pronounced.
Identifying the odd word means finding the one whose stress falls on a different syllable from the others.
Explanation:A. elephant: pronounced as EL-e-phant, so the stress is on the first syllable.
B. ectopic: pronounced as ec-TOP-ic, so the stress is on the second syllable.
C. ensemble: pronounced as on-SEM-ble, so the stress is on the second syllable.
D. enrolment: pronounced as en-ROL-ment, so the stress is on the second syllable.
Options B, C and D all have stress on the second syllable.
Only option A places stress on the first syllable.
Therefore, elephant has a different stress pattern from the rest.
Answer:A. elephant