The tip of a match is ignited as it is struck against the matchbox. Why is this a chemical change?

The correct choice that best explains why the igniting of a match tip is a chemical change is:

**The tip of the match is flammable and is set on fire.**

This is because when the match is struck, a chemical reaction occurs that transforms the materials in the match tip into new substances (such as combustion gases, ash, and heat), which characterizes a chemical change. The other options involve physical changes (like color change or size change) or do not accurately describe the key aspect of combustion being a chemical process.