Answer:
"Red bone marrow is the site of blood cell formation"
Explanation:
Based on the information provided within the question it can be said that the statement that would indicate that the student understood the teachings is "Red bone marrow is the site of blood cell formation". This is because Red blood cells, platelets and most white blood cells appear within red marrow. Such as can be seen in the picture that I have attached below. Yellow Marrow on the other hand is caused by an excess of fat cells.
