Concept:Find the word whose main stress falls on a different syllable compared to the others.
Explanation:The stress in each option is placed on a particular syllable.
Option A: re
PELlent — stress is on the second syllable.
Option B:
PUBlicly — stress is on the first syllable.
Option C:
PARticle — stress is on the first syllable.
Option D:
PRImary — stress is on the first syllable.
Options B, C, and D all carry first-syllable stress.
Only option A has stress on the second syllable.
Therefore, the word with a different stress pattern is repellent.
Answer:A. repellent