A substance has nearly zero resistance at a temperature of 1 K What is such a substance called?

Explanation

**Step-by-Step Solution:**

1. **Understanding Resistance**: Resistance is a measure of how much a substance opposes the flow of electric current. Most materials have some resistance, which can change with temperature.

2. **Temperature Context**: The question specifies a temperature of 1 Kelvin. This is extremely low and is close to absolute zero, where many materials exhibit unique properties.

3. **Superconductivity Concept**: At very low temperatures, certain materials can exhibit a phenomenon known as superconductivity, where they can conduct electricity without any resistance.

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