Which change to a sheet of notebook paper is an example of a chemical reaction?

Question

Responses

Pencil marks are written on the paper.
Pencil marks are written on the paper.

The paper becomes yellow and brittle after several hours in sunlight.
The paper becomes yellow and brittle after several hours in sunlight.

The paper is shredded into about 20 small pieces.
The paper is shredded into about 20 small pieces.

The paper is folded into four sections.
The paper is folded into four sections.

Answer 1

The example of a chemical reaction is:

The paper becomes yellow and brittle after several hours in sunlight.

This change involves a chemical transformation in the paper due to exposure to sunlight, resulting in a change in its properties. The other options describe physical changes that do not alter the chemical composition of the paper.