The sequential order here is genetic information >> natural selection >> evolution. This order allowed the emergence of new adaptations (e.g., the gecko's coloration).
Natural selection
Natural selection is the main mechanism by which evolution occurs.
Evolution means descendence with modifications, it is a process that depends on the differential survival and reproduction of the most adapted individuals in a given environment.
Genetic information (variation) is a prerequisite for evolution to occur.
Learn more about natural selection here: