Accidents such as drowning, for example, if the teen was swimming without proper supervision or in a dangerous area. Also, a violent encounter, like being in the wrong place at the wrong time and getting caught up in a fight or a criminal act.
There are several potential causes. Murder is unfortunately a cause in some true stories. Also, self - harm or suicide could be the reason in certain cases. In addition, environmental factors like exposure to toxins or extreme weather conditions in some situations might lead to the death of the girl.
One possible cause could be the military actions during the Syrian conflict. Bombings and battles in the area where he lived might have directly led to his death. Another cause could be the lack of basic necessities like food and clean water due to the disruption of the war, which made him more vulnerable to diseases and ultimately death.
In some cases, it could be due to immigration issues. For instance, if a person's visa has expired or there are doubts about their immigration status, they may be detained. Also, in a conflict situation, civilians might be detained by the military if they are suspected of being associated with the enemy. This can happen during a war or in a region with ongoing insurgency.
One possible plot could be that a fisherman is out at night fishing. He gets his line hooked on something strange in the water. As he tries to reel it in, he discovers it's an old, cursed object. Then, as the night falls deeper, he starts to experience strange apparitions and terrifying events related to the object.
One possible plot could be that Pikachu sacrifices itself to save Ash from a powerful enemy. Ash then has to deal with the grief and also tries to find a way to bring Pikachu back. Another could be that there's a mysterious disease that spreads among Pokemon and Pikachu is one of the victims. This leads to a search for a cure and also a mourning period for the beloved Pokemon.
One possible cause could be financial gain. Maybe someone outside the family thought they could get a ransom from the family by kidnapping a member. Another reason could be revenge against the family for something they did or were perceived to have done.
Equipment failure is another common cause. In a mining accident based on a true story, for instance, faulty mining equipment such as drills or lifts that break down suddenly can put the miners in danger and result in an accident.
One possible cause could be parental or guardian abuse. Some parents might have mental or emotional problems that lead them to lock a girl in a closet as a way to deal with their own issues. Another cause could be a situation of family poverty and overcrowding, where a closet is seen as a 'solution' to keep a girl out of the way. But these are all unacceptable reasons.
One possible cause is the therapist's lack of training. If they haven't been properly educated in different therapeutic techniques and how to handle various mental health issues, it can lead to bad therapy.
Since we don't have much information, it could be due to an accident, like a car crash or a fall.