Which of the following is an example of a physical change?

The freezing of water is an example of a physical change. During the process of freezing, water changes from its liquid state to a solid state (ice) due to the removal of heat energy. The chemical composition of water remains the same in its solid form as it was in its liquid form. It is a reversible process, meaning ice can melt back into water with the addition of heat.

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the presence of air, resulting in the formation of iron oxide (rust). This is a permanent change and involves a chemical reaction.

Digestion is a complex process that occurs in the body to break down food into smaller molecules through chemical reactions involving enzymes. It is a biological process and involves both physical and chemical changes.

Burning is a chemical change that occurs when wood reacts with oxygen in the presence of heat, producing carbon dioxide, water vapor, ash, and releasing energy. This is also a permanent change and involves a chemical reaction.