None.
no
The same rights they had when they were younger. Your child is not 18 yet.
What rights are you talking about? Are they parents? To give the 19yo custody or terminate the 15yo parental rights you have to go to court to do so. The 19yo have to petition for custody.
No, step parents do not have any legal rights to the kids.
can a 16 year old live on their own and can parents intervene?
In Georgia, an 18-year-old is considered an adult and is no longer considered a minor. As a result, parents may have limited legal rights over decisions made by an 18-year-old child living at home. However, parents may still have a say in house rules and expectations as long as the child is living under their roof.
The legal rights of a fifteen year old towards his or her parents differ from state to state, country to country. In some places they have the right to "divorce" (as it is called in the United States) their parents. In other places they do not have many rights until they reach an older age.
Does a 14 year old have the rights to forgo see the other parent during that parents possession time
Zero. The 14-year-old has no rights. If there is abuse involved, contact social services for help.
None at that age.
Not sure what rights you are referring to here. You have no rights to the baby or to tell her what to do regarding whether she would keep it or not. That is only her choice, not even his.
You can, BUT they either have to be wards of the state or their parents/legal gaurdians sign over parental rights to you. If not, you could be charged with kidnapping or harboring a runaway. If the parents don't care the child is missing, they will most likely sign away their rights.