only with emancipation
no see links
In Maryland, legal guardians are responsible for providing support and care for their children until they reach the age of majority, which is 18. If a parent moves out and leaves a 17-year-old without adequate support or care, they may be at risk of being charged with child abandonment or neglect. It's recommended to consult with legal authorities or child protection services for guidance in such situations.
If you're in the US... No, it's not legal. A 15-year-old doesn't get to decide where she lives. Her parents decide that. And just FYI--anyone who takes in a 15-year-old runaway can face charges for it.
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Most states the age is 12 yrs. of age a child can decide who they want to live with.
Australia has no specific law as regards this. It's handled on a cases by cases basis. see links
If she has already had the baby, no. If she is still pregnant and still lives with them they may have some influence over her, depending on what state they live in.
Only if it is ordered by the court. You can not decide on your own!
She is not allowed to decide this until she is 18yo. Her parents decide.
no he can not
It sould be legal but did your parents agree
That will be up to a judge to decide.