What is the core difference between a seagull naturally finding food versus being handed white bread?

Answer

The behavioral conditioning involved

The core difference lies in the behavioral conditioning: one action allows the bird to maintain its independence and natural foraging drive, while the other teaches it that standing near a person with food is a profitable activity.

What is the core difference between a seagull naturally finding food versus being handed white bread?
fooddietbirdanimalseagull