Final answer:
The model represents the process of using food to grow by showing that molecules from food become part of the organism and that chemical reactions destroy unused food.
Step-by-step explanation:
The model represents the process of using food to grow by showing that:
- d) It shows that molecules from food become part of the organism.
- a) It shows that chemical reactions destroy unused food.
These statements explain that the model represents the fact that food is broken down and its molecules are used to build the organism's own molecules, while any unused food is destroyed through chemical reactions.