Sylvine is an ore of potassium.

Answer

**Step-by-Step Solution:**

1. **Identify the Statement**: The statement we need to evaluate is "Sylvine is an ore of potassium."

2. **Understand What an Ore Is**: An ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.

3. **Research Sylvine**: Sylvine is a mineral that is known to be a source of potassium. Its chemical formula is KCl, which indicates that it contains potassium (K) and chlorine (Cl).

4. **Analyze the Composition**: Since sylvine contains potassium in its chemical formula (KCl), it qualifies as a source of potassium.

5. **Conclusion**: Based on the information gathered, we can conclude that the statement "Sylvine is an ore of potassium" is true.

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