Because of this, when an acid is<span> dissolved in water, the balance between </span>hydrogen ions<span> and hydroxide </span>ions is<span> shifted. Now there are more </span>hydrogen ions than <span>hydroxide </span>ions<span> in the solution. This kind of solution </span>is acidic<span>. A </span>base is<span> a substance that accepts </span>hydrogen ions<span>.</span>
It's not erosion, so that is out of the answer choices. And I doubt it is crystallization, so that is why I think it is A and D. (correct me if I am wrong.)
Law would be the correct answer to fill in the blank. Law is correct because scientific law explains behaviors of natural phenomenons since it's based on repeated experiments.
