No the age of adulthood is 18 in the USA.
No he has been on his own since he was 18.
Yes.
No. Your parents are legally responsible for you.
No, the parents are no longer responsible for them. They are an adult and responsible for themselves.
No.
In most countries a person of 18 or older is legally an adult and therefore responsible (legally) for themselves.
They will have to have parental permission. Until they are 18, the parents are responsible for them.
Not legally unless she has parental permission. Until they reach 18 the parents are responsible for him.
In Tennessee, parents are generally legally responsible for their 16-year-old child, even if the child is married. The parents are responsible for providing their child with financial support, healthcare, and a safe living environment until the child reaches the age of majority. Marriage does not change the parents' legal responsibilities.
In Connecticut, parents are usually not legally responsible for an 18-year-old who chooses not to live in their home. At 18, an individual is considered an adult and is responsible for their own decisions and actions. However, there may be exceptions such as if the parents have a legal duty, such as child support obligations, or if the 18-year-old is still a high school student.
No, the age of majority in Arizona is 18. The parents are no longer responsible for them.
The 16 year old female is legally responsible for herself, since marriage emancipates you. There is no marriage where a spouse is your legal guardian. Marriage is equal.