Which organism in the food web exists only as a predator?

NEED ANSWERS ASAP!!!

All carnivores are predators, and herbivores—and sometimes omnivores or other carnivores—are their prey. Energy moves up a food chain, starting with plants, then moving up through herbivores, and then carnivores.

^•^

The top predator of a food chain is the carnivore within the community that does not have any predators of its own.

c

explanation:

i think

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.