Here are the words with different stress patterns for each group:

1. **C. sugar** - It has the stress on the first syllable (SU-gar), while the others have stress on the second syllable (do-NATE, RUb-bish, GAR-den).

2. **C. tutor** - It has the stress on the first syllable (TU-tor), while the others have stress on the first syllable as well, but "homeless" has a different syllabic structure leading to a different emphasis when spoken.

3. **C. recycle** - It has the stress on the second syllable (re-CY-cle), whereas the others have stress on the second syllable or a more evenly distributed stress pattern (en-VIRON-ment, com-MU-nity, RUb-bish).

4. **C. opportunity** - It has the stress on the third syllable (op-por-TU-ni-ty), while others have the stress on the second syllable (or-GAN-i-zation, vol-UN-teer).

5. **B. enjoy** - It has the stress on the second syllable (en-JOY), while the others have stress patterns more consistently at the beginning (PRO-ject, SIM-i-lar, IN-clude).

In summary:
1. C (sugar)
2. C (tutor)
3. C (recycle)
4. C (opportunity)
5. B (enjoy)