What health hazard is posed by electrical current flowing through the body?

Electrical current flowing through the human body poses several distinct and severe biological hazards. First, because the body acts as a resistor, current flowing through it generates heat that can cause severe deep tissue burns. Second, the body relies on delicate electrical impulses to function. External electrical current disrupts these cellular electrical functions, potentially leading to nerve damage or fatal heart arrhythmias, such as ventricular fibrillation. Finally, the external current overrides the body's natural signals to its muscles, causing involuntary, violent contractions. This is often why a person being shocked cannot simply 'let go' of the energized object. Since all three of these hazards are true, 'All these choices are correct' is the correct answer.