Please choose the correct answer to the question: A worker needs to load a heavy box onto a truck. The worker uses a ramp to move the box because the ramp

Answer1: increases the weight of the box. Answer2: reduces the gravitational force on the box. Answer3: increases the amount of friction on the box. Answer4: reduces the amount of force applied to the box.

Answer format: answer1/answer2/answer3/answer4
Answer: answer4