How does the real alison die?

In the series "Pretty Little Liars," Alison DiLaurentis's death is shrouded in mystery and ultimately revealed to be a murder by her former friend, Charlotte DiLaurentis. However, the storyline is complex, involving multiple twists and revelations throughout the series. Alison later returns to the story alive, complicating the narrative of her supposed death. The series explores themes of friendship, betrayal, and the consequences of secrets.