In order to survive, she must conserve her energy. Instead of wandering aimlessly, she should stay in one area. This makes it easier for rescuers to find her. She can mark her location by piling up rocks or breaking branches in a certain pattern. And she should keep warm. If it's cold, she can gather dry leaves and branches to make a makeshift bed and use her own body heat to stay warm at night.
She should try to make herself visible. If she has any bright clothing, she can tie it to a tree branch. Also, making noise can attract the attention of potential rescuers. Using two sticks to make a loud clapping sound every so often is a good idea. Another important thing is to find shelter from the elements. A fallen tree or a natural cave can provide some protection from the wind and rain.
She could be rescued by a search party. They might find her because they saw the smoke from the fire she made.
She might have survived by finding sources of water. There could have been a leaky pipe or some stored water containers in the basement. For food, perhaps she was given small amounts sporadically by her captor, or she found some old stored food items that were still edible.
She might find a small, hidden cabin. Maybe it's an old hunter's cabin with some basic supplies like a warm blanket and some canned food. This could give her shelter and a chance to survive until she's found.
Maybe they managed to find a hiding place. They could have hidden behind a big tree or in a small cave until the stalker gave up and left.
It's highly unlikely. The fall from 40 stories is so far that the impact would be deadly.
In a 'girl lost in woods story', she could have been separated from her group during a camping trip. She would have to rely on her survival skills, if she has any. She may try to find food like berries or nuts. At the same time, she has to be careful of dangerous animals. She might start a fire using sticks and dry leaves to keep warm and signal for help. As she wanders, she might discover a hidden path or a landmark that gives her hope of finding her way out.
She might have been getting some nutrients in other ways, like through intravenous feeding or some sort of special medical treatment.
Maybe by a search and rescue team. They are trained to look for missing people in difficult terrains like the woods.
I don't think it is. Usually, such stories are fictional creations for entertainment or to convey certain messages.
No, 'Lost Girl' is not a true story. It's a fictional work created for entertainment purposes.