Most of the children, who are caught illegally trying to enter into [A] / enter [B] India from across the border 3) / are sent to the juvenile home
She belongs to the last generation bearing a full set of traditional tattoos and is one of the few who remembers [A]/remember [B] how they were done.
The nobility and refinement of his character makes [A] / make [B] him a very special person.
Enter into – participate, become part of, take part in Enter – arrive, get in, go in Few is plural, hence remember is correct here. ‘Nobility and refinement’ is plural, hence make is correct here.