To illustrate the formation of blood cells, the computer-generated model would be the best choice. This type of model can effectively represent complex processes such as hematopoiesis (the formation of blood cells), including the various stages of blood cell development and the interaction of different cell types within the bone marrow.
In contrast:
- Plastic bone could show the structure of bone but wouldn't effectively illustrate the dynamic process of blood cell formation.
- Dissected pig may provide anatomical context but does not represent the cellular processes specifically.
- Photograph of a bone offers a visual representation but lacks the interactive and detailed explanatory features of a computer-generated model.
Thus, the computer-generated model is the most suitable for illustrating blood cell formation.