Elevator safety pioneer: What did Elisha Otis invent that made passenger elevators practical? Context: Mid-19th-century safety demonstration preventing car fall if the hoisting rope failed. Choose the correct invention.

Concept / ApproachElisha Otis invented a safety brake that prevents an elevator car from falling if its hoisting rope breaks, demonstrated famously in 1854. This made passenger elevators acceptable and safe.

Final AnswerThe elevator safety brake (safety elevator).