Step 1: Understanding the relationship.
The relationship between herbivores and carnivores is one where the carnivore preys on the herbivore for food, making it an example of predation.
Step 2: Analyzing the options.
(A) commensalism: Incorrect, in commensalism, one organism benefits while the other is neither helped nor harmed.
(B) predation: Correct, predation involves one organism (the carnivore) hunting and killing another (the herbivore) for food.
(C) parasitism: Incorrect, parasitism involves one organism benefiting at the expense of another without killing it.
(D) mutualism: Incorrect, mutualism is a relationship where both organisms benefit.
Step 3: Conclusion.
The correct answer is (B) predation, as carnivores hunt herbivores for food.