The role of parents in the green card process for someone seeking to obtain a family-based green card depends on the applicant's age and their relationship to the parent. If the applicant is a child under the age of 21 and unmarried, they may be eligible for a green card through their parent's sponsorship if the parent is a U.S. citizen. This is known as the "immediate relative" category, which includes parents of U.S. citizens.
If the applicant is over the age of 21 and married, they may still be able to obtain a green card through their parent's sponsorship, but they will be subject to a longer waiting period due to the preference categories for family-based green card applications.
It is important to note that in order for a parent to sponsor their child for a green card, they must be able to demonstrate that they have the financial means to support the child and that the child will not become a public charge. This may involve providing evidence of income and assets, as well as completing an Affidavit of Support form.
Overall, the green card process for individuals seeking to obtain a family-based green card through a parent's sponsorship can be complex and requires careful consideration of the relevant eligibility requirements. It is always advisable to seek the advice of an experienced immigration attorney to ensure that the application process is handled correctly.