Circle the word which has different stress pattern

Here are the words with different stress patterns circled:

1. **C. discuss** (stress on the second syllable) – others are typically stressed on the first syllable.
2. **A. habitat** (stress on the first syllable) – others have different stress patterns.
3. **A. quality** (stress on the first syllable) – others have stress shifts.
4. **C. ecosystem** (stress on the first syllable) – others have different stress placements.
5. **C. extinct** (stress on the second syllable) – others vary in stress placement.

These selections indicate words with different stress patterns compared to their counterparts in each set.