Which of the following substances has the highest elasticity

Options

A. Sponge
B. Steel
C. Rubber
D. Copper

Explanation

To determine which substance has the highest elasticity among the given options, we need to understand the concept of elasticity and Young's modulus.

### Step-by-Step Solution:

1. **Understanding Elasticity**: Elasticity is the property of a material to return to its original shape after the removal of a deforming force. The measure of elasticity is quantified by Young's modulus (E), which is defined as the ratio of stress (force per unit area) to strain (deformation in length/original length).

2. **Comparing Young's Modulus**: The higher the Young's modulus, the greater the elasticity of the material. Therefore, to find out which substance has the highest elasticity, we need to compare their Young's moduli.

3. **Identifying the Substances**: The options provided in the question are:
- Option 1: Spawn
- Option 2: Stream
- Option 3: Whatever
- Option 4: (missing option)

4. **Researching Young's Modulus Values**: We need to look up the Young's modulus values for the substances mentioned:
- Spawn (not a standard material, possibly a typo)
- Stream (not a standard material)
- Whatever (not a standard material)
- (Missing option)

5. **Conclusion**: Since the options provided are not standard materials, we cannot determine the highest elasticity without specific materials. However, if we assume that one of the options is a known elastic material (like steel, rubber, etc.), we can conclude that the substance with the highest Young's modulus will have the highest elasticity.

6. **Final Answer**: Based on the assumption that one of the options represents a known elastic material with a high Young's modulus, we can conclude that the correct answer will be the option representing that material.