The statement that a certain percentage of body fat is essential for the body to function effectively is true. Making, breaking, storing and mobilizing fats is at the core of how humans and all animals regulate their energy. So, fats are essential for energy regulation. There are two types of body fat: storage body fat and essential body fat. Both of them are taken into account when calculating body fat percentage.
The goldilocks concept states that you will experience a high peak of motivation when you slightly challenge yourself. The applies to your overall wellness, activity, and diet because when you eat food such as protein and fiber that is good for your body you will have the ability to become more active, which will lead to excellent health and a good sleep pattern which is a part of overall wellness.
You don't really see what type of dangerous situation but since you asked a dangerous situation you could do is a stunt motorcycle guy that rides his motorcycle over a pool of sharks. Or a man who wears red in a Bulls arena to get the balls attention but he risk dying if he gets punctured by one of the bulls horns. Or another dangerous situation could be someone entering a monster cave. Or another dangerous situation could be someone meeting up with a Stranger online. There's just so many situations
Answer:
Fear (from a quick Google search): "An unpleasant feeling triggered by the perception of danger, real or imagined."
Simply put, fear keeps us safe (or at least tries to). It helps keep us on the lookout for things that could be of harm to us.