If you are/were an H1 worker and if your H-4 spouse got included in your green card processing, and if you submitted I-134 (affidavit of support) for her during her Adjustment of Status or Consular Processing, you do NOT have to mention it here. This question is only for family based immigrant sponsorships that you initiated. And in this case, your spouse would be getting a green card on your employment basis, as your dependent.
If you are sponsoring your parents, prepare 2 I-134 forms. In one form, write father's name as visitor and say mother will be accompanying. In the second form, write mother's name as visitor and say father will be accompanying.
2The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section (29 CFR 1910.134), including training, fit testing, maintenance, and use requirements.