Final answer:
Smooth acceleration is the best indicator of a student's ability to demonstrate speed control, as it shows the student's control over the rate of increase in the vehicle's speed.
Step-by-step explanation:
To evaluate if a student is able to show speed control within the context of a WSP (presumably Work-Study Program related to driving or physics), one could observe various indicators. However, the best indicator would be:
- (a) Brake usage
- (b) Smooth acceleration
- (c) Consistent gear shifting
- (d) Maintaining a steady lane position
The correct indicator of speed control in this list would be smooth acceleration. This implies that the student is able to control the rate at which the car's speed increases, which is crucial for speed control. While the other options listed are also important driving skills, they do not directly assess speed control to the same extent.