If the food has germs or it’s rotten
D. doesn't lead to a productive end.
Explanation:
How Age and Exercise Affect Your Max Heart Rate. The relationship between the heart and exercise has been studied for more than six decades and the research is clear: Max heart rate—the highest heart rate you can safely hit during exercise—decreases with age regardless of lifestyle or level of fitness.
Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:
