Answer:
Water reacting with nitrogen gas
Explanation:
A<em> </em><em>physical change</em><em> occurs when matter changes its form without a change in its chemical identity</em>. A<em> </em><em>chemical change</em><em>, on the other hand, occurs through a chemical reaction, forming new products.</em>
When water evaporation, freezing, and heating produce physical changes in water, therefore the correct answer is "Water reacting with nitrogen gas" because it alludes to a chemical reaction.
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