I think the three components are: environment, personal choices, and habits.
Answer:
Mold
Explanation: I just took the test and that was the answer
bone marrow <span>contains hematopoietic stem cells, which give rise to the three classes of blood cells that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)</span>
Where are the choices...... High impact aerobic activities that are hard in your joints, examples, jogging, jumping, football, ect
