Please choose the correct answer to the question: Many common hand tools create a mechanical advantage by using the basic principles found in simple machines. For example, a screwdriver uses the principles of the wheel and axle. In order to increase gripping force, pliers use the principle demonstrated in the

Answer1: pulley. Answer2: lever. Answer3: wedge. Answer4: screw.

Answer format: answer1/answer2/answer3/answer4