Explanation:

- The area under the curve of a velocity-time graph represents the displacement. This is because displacement is the integral of velocity with respect to time.

- Speed is the magnitude of velocity and does not consider direction, thus not represented by the area under the curve.

- Velocity is the speed of an object in a given direction and is what the graph is showing, not what the area represents.

- Acceleration is the change in velocity with respect to time, usually represented as the slope of the velocity-time graph.

Answer: Option 2 - Displacement

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