Answer:
To be honest there are many prefixes (duh)
Step-by-step explanation:
The prefix ornith- means birds, so "ornithophobia" means fear of birds. To solve this analogy you need to determine what "xenophobia" is the fear of. To do this you will need to rely on your knowledge of Greek prefixes. The prefix xen- means foreign, so "xenophobia" is fear of foreigners.