Principle #1 Genetic Variation: The genetic variation is rabbits that have white fur and rabbits that have dark fur.
Principle #2 Overproduction & the Struggle for existance: The overproduction is the white furred rabbits. Many of them are being produced, causing them to struggle to survive because they are easy for predators to see.
Principle #3 Differential Survival & Reproduction: The rabbits that have dark fur have a higher fitness because they blend in to the environment and are harder to be seen
Principle #4 Changes in Gene Pool Overtime, the rabbits fur color will be dark due to the dark fur rabbits being able to survive longer and reproduce.