The correct response is Class 1 and 2.
In a Class 1 lever, the fulcrum is positioned between the effort (force) and the load, allowing for a trade-off between force and distance. In Class 2 levers, the load is between the fulcrum and the effort, which allows for an increase in force at the cost of distance moved. Class 3 levers do not increase force; instead, they require more input effort to move the load.