One could be the lighting of a firefly, because there is a chemical reaction that happens inside of the firefly that makes it glow, and another could be making food, because you have to add baking soda in some foods, and it reacts with other ingredients. Hope that helps.
A standardized test taken by most high school Juniors and Seniors in order to qualify for college admittance and scholarships
Answer:
<em>A</em> best summarizes how climate change can affect the mass of migration of humans on earth
The answer is petrified fossils