It is the producers. They make their own food and are food for the consumers to eat. Like us the, Humans.
The "<span>complete predicate" in this form would actually be "Family". When considering the predicate, we are looking for the person that would be taking this kind of action. And in this case, it would be the family.
</span><span>The family enjoyed a tasty fish supper.</span>
It would be fittest
hope this helps
B is better because it has more surface area.