Explain why the shapes of high-speed vehicles are streamlined ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Streamlined Shapes**:
- Streamlined shapes are designed to minimize resistance when moving through a fluid, such as air. This is crucial for high-speed vehicles like cars, airplanes, and trains.

2. **Air Resistance (Drag)**:
- As a vehicle moves, it pushes air out of the way. This interaction creates a force known as drag or air resistance. The greater the drag, the more energy (or fuel) is required to maintain speed.

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