In the context of a wheelbarrow, this question is about identifying the components of a simple machine called a lever. A wheelbarrow is an example of a second-class lever. Let's examine the key components of this lever:

• Fulcrum: This is the point about which the lever rotates. In a wheelbarrow, the wheel acts as the fulcrum.
• Effort: This is the force applied to move the load. In this scenario, the effort is applied by the boy who lifts the handles of the wheelbarrow.
• Load: This is the weight or force exerted by the objects being moved. Here, the load is the sand placed in the tray of the wheelbarrow.
• Arm: This term doesn't specifically apply to a component of the wheelbarrow in this context. It generally refers to the length between the fulcrum and the point where effort or load is applied, divided into effort arm and load arm.

Thus, in the arrangement described, the sand represents the Load.

Let's clarify why each option other than Load is incorrect:

• Arm: The term pertains to lever arms, but it doesn't specifically designate any component or load in the wheelbarrow scenario.
• Fulcrum: The fulcrum is the wheel, not the sand.
• Effort: The effort is provided by the boy lifting the handles, not by the sand.

Therefore, the correct answer is Load because it accurately describes the role of the sand in the wheelbarrow as the weight being transported.