Answer: b.salmon eating shrimp
Step-by-step explanation:
A food chain is a linear sequence of transfer of food and energy when one organism is consumed by the other. In this way the energy and matter changes it's form.
b.salmon eating shrimp is the correct option this is because of the fact that shrimp is eaten by salmon. This will add up to the body mass of salmon and in this way the matter changes it's form in food cycle.