Answer:
The answer to the question is option <u>D</u>
The very last option is the correct answer.
The answer is buffers.
Chemicals called buffers are those that can combine with H⁺ when hydrogen ions are in excess, and release H⁺ when hydrogen ion levels are low. the function of these chemicals is to minimize changes in pH.
Buffers are the substances that resist change in its pH on addition of small volume of acid and base.
