2lizards from a large mainland population are float across the ocean and colonize an island. different allele frequencies on the island compared to the mainland are likely to be caused by:
a. selection
b. mutation
c. genetic drift
d. gene flow

Option (C)

Explanation:

From the given case/scenario, we can state that these different allele frequencies when compared to mainland are more likely to be caused by Genetic drift. Genetic drift is also known as Sewall Wright effect is referred to as the change in any frequency of the existing gene variant in a given population which occurs because of random sampling of the organisms.