The correct answer is option a) mimicry.
Mimicry is a defense mechanism which is inherited from generations to generations that is why it is considered as an innate behavior not a combination of innate and learned behavior. Inheritance of a trait is the basic difference between innate and learned behavior. Learned behaviors are confined to only a particular organism and they are not passed on to that organism's off-springs. In mimicry, a harmless creature pretends as if it is very dangerous. So, the predator thinks that it is almost impossible to kill that organism and predator does not feed upon it. In short, mimicry increases the fitness of an organism.