Fear
Fear is an emotional response to threats and danger. Fear should be distinguished from anxiety, which typically occurs without any external threat. Additionally, fear is related to the specific behaviors of escape and avoidance, whereas anxiety is the result of threats that are perceived to be uncontrollable or unavoidable.
Fear is often connected to pain (e.g. some fear heights because if they fall, they may suffer severe injury or even die upon landing). Many theorists, such as Watson and Ekman, have suggested that fear is one of several basic, innate emotions (e.g. joy and anger). Fear is a survival mechanism, and usually occurs in response to a specific negative stimulus. Thanks Wikipedia
What would you do if you were this cat ?
