The process by which blood is transferred from one person to another is called blood
transfusion
The correct option is (a).
Explanation of the correct option:
Explanation of the incorrect options:
Option B:
Regulation refers to the maintenance of something.
Option C:
Classification refers to the categorization of things based on their similarities and differences.
Option D:
Donation refers to giving the blood to the needy.
Final answer: The process by which blood is transferred from one person to another is called blood transfusion.