Which of the following is a chemical property of paper?

A. Color
B. Ability to Burn
C. Size
D. Thickness

I think it is color because don't they use a chemical to give paper its color

Nope. Ability to burn.

The correct answer is B. Ability to Burn. Paper has the ability to burn due to its chemical composition. It is primarily composed of cellulose, a flammable organic compound. When exposed to heat or an open flame, the cellulose molecules break down, releasing energy in the form of heat and light, and causing the paper to catch fire. Therefore, the ability to burn is a chemical property of paper.