Fill in the following blanks with suitable words :
Shapes that are designed to reduce air resistance are called……………………shapes.

Options

A. Circular
B. Elliptical
C. Streamlined
D. Elongated

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks for a term that describes shapes designed to minimize air resistance.

2. **Identifying Key Concepts:**
- Air resistance is a type of friction that opposes the motion of an object through air.
- Certain shapes can be designed to move through air more efficiently.

3. **Recalling Relevant Terms:**
- The term "streamlined" is commonly used in physics and engineering to describe shapes that reduce drag or air resistance.

4. **Filling in the Blank:** Based on the understanding of the concepts and the relevant term, we can fill in the blank:
- Shapes that are designed to reduce air resistance are called **streamlined shapes**.

5. **Final Answer:** The completed sentence is: "Shapes that are designed to reduce air resistance are called **streamlined shapes**."

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