Answer:
B. agreeable
The word "intrinsic" means "belonging naturally; essential." The word "natural" in the analogy means the same thing. Therefore, the correct word to complete the analogy must mean something similar to "belonging naturally" or "essential."
Out of the options given, "agreeable" is the best match for this meaning. The word "compatible" means "able to exist or occur together without conflict," and if two things are compatible, they are generally agreeable with each other. Therefore, the correct answer is B. agreeable.