The answer would be C) livestock. Because if you think about it, it became a science "back in the day" when people had livestock to sell, eat, and profit off of, so when they got sick or injured, there became a need for this practice
Answer:
Eating healthy and exercising every day
Explanation:
Since he is genetically pre-disposed to suffering from diabetes, he has to eat halthy foods and exercise every day to prevent it.
The function of the nucleus is to control the other organelles. It also functions to contain the DNA of the cell causing the cell's behavior and actions. It's basically the "big boss" of the cell.