Arrange aluminum, silver copper and iron in the increasing order of conductivity.

Explanation

To arrange aluminum, silver, copper, and iron in the increasing order of conductivity, we need to consider the conductivity values of each material. Here’s how we can approach the solution step by step:

### Step-by-Step Solution:

1. **Understand Conductivity**: Conductivity is a measure of a material's ability to conduct electric current. The higher the conductivity, the better the material is at conducting electricity.

2. **Identify the Conductivity of Each Material**:
- **Silver**: Silver has the highest conductivity among all metals.
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