The correct answer is C. eccentric.
An eccentric person is someone who behaves in a way that is unusual or strange, but not necessarily in a bad way. They may have unusual interests or hobbies, or they may dress or act in a way that is different from most people. Eccentric people are often creative and original, and they can be very interesting to talk to.
The other options are not as accurate descriptions of someone who is fond of weird pets. An ambitious person is someone who is determined to achieve success. An amiable person is someone who is friendly and pleasant. An emotional person is someone who is easily affected by their emotions.
It is possible that the person in the question is all of these things, but the most important detail is that they are eccentric.