Very different looking anoles on the same Caribbean Islands that have similar DNA sequences are evidence of:

a. divergent evolution b. convergent evolution

c. coevolution d. gradualism

Similar DNA sequences would be indicative of a recent common ancestor hence the answer should be divergent evolution as the different appearances are evidence of divergence from a common ancestor.

It is unlikely to be convergent evolution as convergent evolution likely results in animals with similar appearances. Convolution would indicate similar modes of evolution between 2 different species that aided each other over time. While this is a product of gradualism, this is not evidence for gradualism directly.