Answer : The correct answer is -
C. defensive.
Warning coloration can be described as a type of defensive behavior that some species have adapted so as to avoid being easily captured predators.
Species use bright colors and exhibit certain distinctive patterns that serve as a great warning to the predator, indicating that they are not the desirable preys.
Example - Frogs, which exhibit bright colors of poison arrow to warn the predators.
Thus, option C) is the right answer.