A well-founded fear of persecution is part of the refugee definition used in asylum law. It concerns a genuine fear of future persecution that also has an objective basis in the facts and evidence.
Personal fear and objective evidence work together
Write down exactly what you fear would happen if returned, who you believe would cause the harm, why that person or group would target you, how they could find you, and what has happened to you or similarly situated people.
Country-conditions evidence can provide context, but a general report that a country is dangerous does not automatically establish an individual's claim.
Keep the evidence tied to the question
Useful records may include recent threats, communications from people at home, evidence of continuing interest in the applicant, treatment of family or similarly situated people, current country reports, and evidence about government protection.
Older evidence may still matter for historical context. Clearly label dates so a reviewer can distinguish current conditions from older events.
Official sources
This is a general explanation; whether a fear meets the legal standard is case-specific.