a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals ->  hair is a kind of object that tends to lose electrons after being rubbed with other materials  hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced ->  hair losing electrons causes the electrical charge of hair to be unbalanced  hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object ->  hair is an object that causes static electricity by losing electrons  hair is an object that causes static electricity by losing electrons & losing electrons changes the charge of an object into positive -> hair being positively charged causes static electricity