How does a lever work - JSS2 Basic technology Power and Machines Question

A lever is a rigid bar that pivots around a fixed point called the fulcrum. By applying a force at one end, the lever amplifies this force to lift or move a load at the other end. The position of the fulcrum, the length of the lever arms, and the input force determine the mechanical advantage. This allows a smaller input force to move a larger load, making it easier to lift heavy objects. Levers are classified into three types based on the relative positions of the fulcrum, effort, and load.