Choose the word which is stressed differently from the rest

Choose the word which is stressed differently from the rest.
1. a. different b. terrorist c. contrary d. domestic
2. a. future b. burden c. device d. certain
3. a. development b. security c. pessimistic d. particular
4. a. threaten b. appear c. modern d. instance
5. a. experience b. technology c. environment d. optimistic