slowing down at a red light

Let's categorize the items you've listed based on their definitions:

1. **Speed**: This is the measurement of the distance an object traveled in a specific time. It does not have a direction associated with it.
- Example: 25 km/hr

2. **Velocity**: This refers to speed and direction an object traveled. It is a vector quantity, meaning it has both magnitude and direction.
- Example: 100 km/hr north

3. **Acceleration**: This is the change in speed and/or direction. It quantifies how quickly an object is speeding up or slowing down.
- Example: Slowing down at a red light (this indicates a decrease in speed, which is acceleration in the negative direction).

Here's the proper alignment:

- Measurement of the distance an object traveled in a specific time: **Speed**
- Slowing down at a red light: **Acceleration**
- Speed and direction an object traveled: **Velocity**
- 25 km/hr: **Speed**
- Change in speed and/or direction: **Acceleration**
- 100 km/hr north: **Velocity**

If you have any additional questions or need further explanation, feel free to ask!